It's spring, and Kotomi enters Ousai Academy. Shino thinks of trying her version of exposure play while giving a speech during Entrance Ceremony. Shino gives Kotomi a tour of Ousai Academy, as Takatoshi gets deja vu. Takatoshi is now classmates with Suzu and Nene, and finds that his frequency of tsukkomi will increase. Kaede meets the Tsuda siblings walking together on a rainy day. Hata interviews Kotomi, and both of them compete to see who knows about Takatoshi the most by revealing his embarrassing secrets. Kotomi introduces her new friend, Toki. At first, she seems like she is a delinquent, but they find out she is actually just a clumsy girl. Aria records Shino's ambiguous sentences, and is excited to play them back. Hata interviews Toki. Shino reveals that Takatoshi is next in line to be the Student Council President. Hata interviews Dejima. On Ousai Sketching Competition day, the Student Council members draw each other, with various indecent jokes. In the broadcasting room, Shino still tries to do her own version of exposure play while giving a speech. In a post-credits scene, Takatoshi and Shino meet with Amano while walking to school, and Shino is surprised to see her vice president and ex-vice president get along really well.

Kotomi is being lazy in her room during spring break, a week before the entrance ceremony. Shino, Aria and Suzu comes to Tsuda's house to give Kotomi congratulatory presents for enrolling, which happens to be books, books and more books. Kotomi tries to tease Suzu about walking with Takatoshi to school, though surprisingly, her tease is spot on. Various front of gate moments. Toki comes to school wearing a t-shirt, yet she forgot to take off the price tag. Kotomi realizes that her brother is popular with girls, though he replies that they are just people he occasionally interacts with, as she misunderstands the statement. There jokes about Suzu and her height. Yokoshima complains about being disrespected, while acting indecently. There are various jokes about student council cleaning day. The Ousai Academy Swimming Contest is going to start, so the student council cleans the swimming pool. Mutsumi, Suzu and Shino win their respective races. Various jokes about missing items in the pool. While looking at Shino, Kotomi says that she might be a new genre "taikou moe" character. While Shino was in Ousai Elementary School, a new trainee teacher named Koyama transfers in for two weeks. Shino surprises her from the start by asking private questions and mispronouncing phrases.

Also known as Seitokai Yakuindomo OVA.^[5] Yokoshima talks about her little cousin. Shino tells Takatoshi to watch her carefully so he can be the next student council president. Shino deals with her horoscope reading. The council conducts club inspections. The council meets over summer vacation. They act as sports managers for the judo club. The council hosts a visiting student council and their president, Uomi.

Suzu's dog gets loose and makes his way to the school. The council girls visit Takatoshi and Kotomi's house when a typhoon hits. Aria hosts a fireworks party at her house.

Takatoshi finds a dried squid in the student council room. He tries to clean, but he spills waters from the pail onto his trousers, as Shino enters the room and start misunderstanding everything. It's spring, and the student council members plus Dejima and Kotomi goes flower viewing. Suzu helps a kid get her trapped balloon down from a tree. More jokes about sake. Another Takatoshi and Dried Squid episode, where Shino tells Suzu and Aria what she saw (misunderstandingly). It's summer, and the student council members investigate The Seven Mysteries of Ousai with Hata, with the last mystery actually just Yokoshima assaulting male students. The next Takatoshi and Dried Squid segment, Shino explains what she saw to Kaede, who passes out as a result. It's fall. Tokky gets lost while looking for the cafeteria. More happenings in cafeteria. Yokoshima complains about not being a good advisor, yet she gives bad advice. The student council tries to insert a new menu at the cafeteria by using the suggestion box, which ends up being cake. Uomi comes to Ousai once more, and seek advice from Shino.

Also known as Seitokai Yakuindomo Kaettekita OVA Vol.1^[11] The council deals with the summer heat. The stairs cause a lot of falls. The school has another culture festival. Uomi plays in a softball game. Shino and the girls participate as Miss Ousai contestants.

Also known as Seitokai Yukindomo Kaettekita OVA Vol. 2^[12] Takatoshi gets a cold so Suzu has to be the straight-man for the day. The council patrols after school; Dejima gives them a limo ride. Takatoshi gets chocolates for Valentine's Day. In a post-credits scene, Shino and Takatoshi go shopping.

The Ousai student council members use the suggestion box in order to invite a person to give speech about his/her job; when the most popular job ends up being maid, and Dejima-san voluntarily gives lessons to the students in cleaning and cooking. In Takatoshi and Dried Squid, the culprit is revealed to be Kotomi, who got a dried squid from Yokoshima. Takatoshi is glad that it was all just a misunderstanding, until Kotomi reveals that the tissues on the table were put there by her intentionally to invoke misunderstanding, which angers him. Aria tries to decline an engagement proposal, so she asks Takatoshi to pretend to be her boyfriend, to Shino's and Suzu's chagrin. The engagement is cancelled in the end because the groom is Dejima-san's customer. Takatoshi and friends are going to have a test, so Shino helps Takatoshi and Suzu study in the student council room. Takatoshi, Suzu, Nene, Mutsumi and Chiri have a group study. Aria invites everyone to the new Shichijou Hot Spring Hotel. Shino realizes that Uomi is big-breasted. Hata tries to spy on the girls bathing by using a video camera tied on a remote-controlled helicopter, but Mutsumi foils the plan. The girls talk about new year's resolutions. Tokky reveals that she wants a piercing (on her ear), as Shino deliberately misunderstands. Everyone (minus the tied-up Yokoshima) watch the first sunrise of the year.

The student council members celebrate new year at Tsuda's house. Various random moments in student council room. Hata spreads rumors about Shino and Takatoshi, and Igarashi asks Suzu to find out, even then, bad communications turn it into another misunderstanding. Shino tries to be a humorous leader, though she didn't realize that she is one from the start. Suzu parents go on a vacation, so Mutsumi and Nene stays at Hagimura's house. They watch a horror movie, to Suzu's horror. In Unadapted Manga Episodes (Full Throttle) segment: the girls are in a sauna, student council members + Kotomi, Tokky and Dejima go on a ski vacation. Aria's "What is this" segment features a blasting-off rocket model. The student council members do a heat endurance contest during summer at Tsuda's house, with Shino secretly intending to lose weight (but failing). The student council organizes a cold endurance contest for Ousai students instead by having them stay in the swimming pool covered with ice. Kotomi implies that she wet herself (inside the pool), but the truth is still a mystery. As the ice melts away, Suzu and Mutsumi win the contest in a tie. Shino wants to clap by spanking Tsuda since her hand is full. In "Tell them, Uomi" segment, Uomi works part-time in a fast-food restaurant. Furuya comes visiting in the evening, and expertly finds out that Shino is going commando.

Shino hurts her leg in P.E, so Tsuda is asked to replace her to give speech during assembly. Tsuda practices on his speech. Hata asks the student council help to take pictures of judo club members. As they can't decide on the last two pictures to use as the poster, they decide to choose it by flipping coin. Tokky flips a coin, but as the clumsy girl she is, the coin is lost. In Unaired Episode segment, Yokoshima-sensei eats a healthy diet, Shino gives advice to a downed Takatoshi, Shino warns Tokky about her flashy shirt, Mutsumi changes places with other people, Takatoshi watches the girls talking about body (part) shapes. A sports festival between schools starts. Aria becomes a cheerleader. Shino and Uomi compete on what Takatoshi should call them (as both of them respond to the call 'President', and it's before Takatoshi becomes Uomi's relative). On the second day, Suzu and Takatoshi take pictures of the Tennis Club for Newspaper Club. Takatoshi founds Yokoshima-sensei disguising herself as an Ousai student and forces her to change clothes. On the third day, Tokky and Mutsumi win their respective competitions, despite the former having a leg injury. The student council members do radio exercise during September, with Kaede joins in.

Takatoshi wakes Kotomi from her sleep, and a concerned Uomi barges in wearing apron with a ladle in hand. Joke about misinterpreting of the meaning of Koumon. The student council talks about love and relationships, with Hata trying to pry upon the (non-existing) love triangle in the council. Student council members are in charge of lost and found. Kotomi lost her Excalibur (umbrella). They find a photo album, and the evidences points to Hata as the owner. Hata lost her camera, but then immediately disclaims it when they want her to prove that the lost camera is hers by telling what pictures are in there. They talk about lost gloves. Takatoshi and Shino have their hands stuck at the Koumon (back gate). Shino replaces the fluorescent lamp, but she loses grip of it. Aria saves it from falling as it bounces off her chest, to Shino's dismay. Aria and Shino try to exchange circumstances of their breasts, but it still doesn't change anything. It's time for marathon race. Kotomi trains to be so fast as to leave afterimages. Shino mishears Takatoshi's (and other's) sentences a few times. The starter pistol breaks, so they resort to spanking sounds instead. Mutsumi wins the second year category. Shino wins the third year race against Aria by a sliding finish. It's autumn, and the student council members sweep the falling leaves. Afterwards, they cook roasted sweet potato using the leaves. It's winter, and since snow is falling, the Tsuda siblings and Suzu go to school, only to find out that the school is closed for the day. Yokoshima-sensei eats with them at student council room. Afterwards, they play Ousama Game. In parent-teacher meeting, Uomi acts as Takatoshi's guardian (since Tsuda parents are out of town), and Takatoshi tells that he acts as Kotomi's guardian as well.

The student council has a routine meeting, and then a patrol around the campus. Aria's "What is this?" segment features a starfish. Aria, along with Shino, trains Takatoshi, Suzu, Todoroki and Mutsumi, practice tennis at the Shichijos' court, with Boa the dog and Dejima the maid attempting to peek. They lose anyway due to muscle pain. Igarashi tries to deal with her fear of boys. Hata charges her voice recorder in front of Takatoshi while acting like she's confessing her love. Takatoshi and Fried Squid (Max Power) segment, it shows Hata's movements on framing Takatoshi from beginning until the end. Uomi waits for Takatoshi in front of the Ousai gate, attracting attention. Uomi stays over at Tsudas' house (just the two of them, as Kotomi is staying over at Tokky's house), and the next morning, Shino, Aria and Suzu arrive, and go over what happened last night. They talk so much they are late for school. Shino founds a superimposed picture of Takatoshi (courtesy of Kotomi), and loses the bet of not laughing for the day.

Nozomi Mori, the vice-president of the student council of Eiryou High School, is introduced into the anime. Uomi is late to school due to staying over at Tsuda's house. The student council talks about appearances, and Takatoshi is dense enough not to realize any subtle changes (including girls' feelings for him). Yokoshima-sensei asks the student council on how to be respected by uttering words of wisdom. She ends up giving birth to a terrible saying. The Ousai student council joins Hata in her investigation on an urban legend about a kappa that emerges from the river and attacks the anus of the passerby, and the subject turns out to be Dejima. Shino and Uomi exchange their positions for one day as an interaction between the two student councils. At Ousai, Uomi pursues intimate interactions with Takatoshi; meanwhile, at Eiryou, Shino feels uneasy (though she still makes the usual jokes). In an attempt to cheer Shino up, Mori asks Shino about her vice-president, though this makes her sulk more.

In a post-credits scene, Takatoshi, Aria and Suzu go to Eiryou to pick up Shino, making her happy; Nozomi sees Takatoshi, and seemingly gets attracted to him.

The council talks about doodling. During summer break, the student council members plus Kotomi go to the Shichijou family's deserted island for three days. Uomi goes to Tsuda's house for a late summer's visit. Mutsumi borrows a "Rabu doll" from the student council for Judo practice. Various jokes about the judo club members. The Tsuda siblings and the council girls have a study session at Tsuda's house and make ice cream together. Shino, Tsuda and Aria model the school uniforms.

With tests over, the council takes 'the long way home' (though, as Takatoshi notes, going home and changing out of their uniforms kind of defeats the purpose of calling it that). The trip includes stopping at the fast food place where Uomi works (much to Aria's delight, as she normally does not dine on such food), underwear shopping, and karaoke. Takatoshi is late for school, and is to be made to clean the Student Council room as punishment, but because Aria has already done so, the council ends up cleaning the bathrooms, starting with the men's; the inevitable discussion about urinals ensues. When it comes time to clean the women's restroom, it's discovered that someone has been bringing in makeup (due to the smell). The girls talk about accessories. Shino mishears a question from Takatoshi about face cream. The Student Council conducts receipt reviews to determine whether club funds are being used appropriately; the Newspaper, Chorus, Robot Research, and Judo clubs all submit records for review. According to the Moral Enhancement Report, mismatched uniform violations have dropped, but Shino worries that students might start wearing their swimsuits underneath their uniforms (with Takatoshi realizing that his is sister is one of the people likely to do that). Ms. Yokoshima's declaration of a surprise bag inspection leads to the council performing such an inspection of their own bags, with humorous results. Ms. Koyama meets Furuya. A continuation of the 'seaside school' segment from the movie sees the students at an aquarium, and on the train ride back, Takatoshi and Shino discuss possible career choices, with the former causing an unintentional misunderstanding when asked about it by Aria. A skit with Kotomi and Tokki. At Eiryou, their pool is getting ready to open, and Nozomi reveals she can't swim. As she's embarrassed about the thought of practicing at her own school pool, Uomi contacts Shino to use Ousai's pool. Thanks to the combined efforts of both student councils, Nozomi does learn how to swim.

In a post-credits scene, Shino intercepts Takatoshi after school, but the latter is still annoyed about a question she asked him the last time this occurred. Shino replies that she can't help it, and Takatoshi quips that he can't help being her straight man, though he insists she give it a rest for the day.

Shino hopes for something good to happen while watching the cherry blossoms fall. Takatoshi helps out in an Art room, but accidentally breaks a piece of pottery. While attempting to put it back together, he gets glue on his hand, and Kaede, who happens to be passing by, sees the glue, and, thinking it's blood, grabs his hand, getting stuck to him as a result. Since there's not enough time to get them unstuck before a meeting, the two are forced to sit through it stuck together. During said meeting, a proposal is floated to use brightly colored balloons to deter birds from flying over the school's athletic fields, and Shino endorses it. Takatoshi and Kaede are eventually separated, but not before the former gets hot water poured on him. Kotomi gets a bad grade in Home Economics, and, bemoaning her lack of experience, becomes the manager for the Judo Club. The council checks up on the Judo club. Kotomi accidentally washes the underwear of the Judo Club members while they shower, forcing everyone to go commando. Another 'What's This' segment with Aria. Ousai's Film Club is entering a competition, and the Student Council members end up participating in the production (thanks to Takatoshi being willing to do so, whereas all 3 girls initially decline); Suzu is eventually chosen as the lead heroine, with Shino and Aria as the other two heroines. Various jokes, including the inevitable mention of AVs, abound during production. At Eiryou, a need for someone tall (to reach a box on a shelf) results in Uomi semi-forcibly recruiting Yuu Hirose into the Eiryou Student Council ranks. The two student councils meet later on, to introduce Yuu to Ousai's council (with Uomi referring to Yuu as a 'ghost officer' beforehand, much to Suzu's discomfort).

In a post-credits scene, the film made earlier in the episode is previewed, and the post-production process is detailed.

The Ousai Student Council has been fascinated by mystery novels, and Aria pulls some strings to have the Shichijō Groups new detective program set up for them (as well as Uomi and Kotomi, who tag along). On the way there, the council members discuss the concept of having life goals, with the Tsuda siblings realizing they lack them. The tour bus 'breaks down' and the group heads for a nearby mansion, and the 'owner' agrees to let them stay the night. Takatoshi finds a note in the room he chooses saying that he is supposed to be the culprit. Shino's panties go missing, and Takatoshi assumes the role of detective. While Shino and Takatoshi are talking, Kotomi's panties go missing, disqualifying Takatoshi as the culprit. After a warning is given at dinner, Suzu's bra goes missing. After all the futons are moved into one room, Takatoshi deduces that Dejima is the culprit. The council participates in a community report meeting, along with Furuya, who has free time due to her classes being canceled. The Robot Research, Newspaper, Chorus, Film, and Pottery clubs all give reports. Takatoshi and Nozomi bump into each other while out and about; Nozomi teases him about buying food while wearing his school uniform, but gets confused when he buys a double crepe; it turns out he hadn't had lunch that day. At Eiryou, Nozomi proves adept at imitating Uomi's voice; since the latter has lost her voice because of a cold, Nozomi has to fill in for her during a PA broadcast. However, she can't fool Takatoshi when he calls Uomi. The Ousai Student Council pays a visit to Eiryou to check on Uomi, where Takatoshi inadvertently causes a misunderstanding.

In a post-credits scene, Shino again intercepts Takatoshi after school while he's wearing the school mascot costume. The two walk, and she apologizes for being so strict with him when they first met, and admits there may have been an ulterior motive for her actions. She tries to tell him something, but cannot get the words out; it then turns out that the person in the costume isn't Takatoshi at all, but the school principal, and Shino gets very embarrassed about the mixup. When Takatoshi himself arrives, Shino's embarrassment is heightened, and her resolve crumbles.

Shino discusses the meaning of kiss placement with her fellow council members. Nene and Suzu are discussing cakes, and Mutsumi reveals that the Ousai Judo Club will be challenging the Seikou Girls Academy Judo Club. She announces that she intends to get a part time job before the match (as she needs to pay for snacks, since they're not covered by her clubs budget). Takatoshi gets a job at the same mall. While on the clock, Shino and Suzu run into them while Mutsumi is upbraiding Takatoshi for talking while in costume. Suzu has her picture taken with Takatoshi while the latter is in costume, and inadvertently places one of her hands in a sensitive area. Shino, Suzu, and Aria watch some balloon art, and Aria has a joke about condoms. Shino and Suzu intervene when Mutsumi and Takatoshi are taking off their respective costumes (as Mutsumi's bra is visible through her shirt). Later on, the Ousai Judo Club, with the Student Council and Ranko tagging along (as moral support and reporter, respectively), heads off to the match. On the bus ride, Shino mulls over seat reclining etiquette, while Mutsumi has to deal with her motion sickness. While everyone else is sleeping, Ranko attempts to take pictures of them, but is thwarted because everyone is wearing sleep masks. After arriving at Seikou, both clubs prepare for the match, Ranko explains the rules. Tokky is first up, and is bested by her opponent; Chiri Nakazato wins her match. This leaves Mutsumi's match as the deciding one for the overall match; as it happens, her opponent's surname is Tsuda (no relation to Takatoshi and Kotomi). After a pitched match, Mutsumi is victorious, handing the overall victory to Ousai. Afterwards, the Ousai contingent spends time at a hot spring inn, courtesy of Seikou. While there, Ranko again attempts to get pictures of everyone while sleeping but is thwarted again (this time because everyone is sleeping face down). This is followed by a cooking segment with Shino and Chihiro, featuring lamb and vegetable stir fry.

During Golden Week, Nao Hanamaki and her boyfriend Yoshi-kun plan to go to a theme park, to which Kaede reminds her that she's still a student; in response, Nao invites her to join them, and asks Takatoshi to be Kaede's date, much to the shock of the other student council members. Although Kaede claims she and Takatoshi are only there to supervise, she starts having fun (although she does not realize it), and Nao remarks that she and Takatoshi get along well. At the haunted house, Kaede and Takatoshi run into Dejima, who notes that the theme park is operated by the Shichijou group, and notes that Aria and the others are watching via the surveillance cameras. Kaede wins a stay at the theme park's attached hotel after throwing a coin into a fountain; the other members of the Student Council invite themselves along to stay. The group ends up holding a study session to assuage Kaede's discomfort about spending the night, but eventually gets side-tracked by karaoke. On the train ride home, Kaede reflects on the experience, and admits that it was fun, but quickly admonishes herself, thinking that she only wants to go to the theme park again.

In a post-credits scene, Shino bemoans the fact that she has only hung out with Takatoshi once outside of school by herself, and that was only because Suzu and Aria couldn't make it, whilst others, such as Kaede, Nozomi, and Ranko, have spent time with him outside of school. She intends to ask him out on a date, but when she encounters him in the hallway, the words once again fail to come out. However, Takatoshi inadvertently gives her an opening when he notices the tickets she is holding, and she says that they're for the four of them. Having both failed and succeeded at her objective, she tears up, prompting Takatoshi to ask what is wrong. Shino partially salvages the situation by saying that she only has two tickets at present, and that she and Takatoshi will go and pick up the other two together after school, to which he agrees.