Monni (Korean: 몽니) is a South Korean rock band signed to Modern Boy Entertainment. The quintet consists of Kim Sin-eui (vocals), Gong Tae-woo (guitar), Lee In-kyoung (bass), and Jung Hoon-tae (drums). The band formed in 2004 and they released their debut studio album First Day, Light the following year with their original drummer Song Ju-hwan. Following his departure from the band, Jung was recruited to take his place. The band released its second studio album This Moment in 2010. In celebration of their 10-year anniversary, they released a compilation entitled Monni 10th Anniversary Best Album 'Fix'.

Beginning in winter 2003, Kim Sin-eui, Lee In-kyoung, Song Ju-hwan, and a keyboardist began practicing collectively.^[1] Kim read the word "monni" (몽니; lit. greed) in a newspaper and "immediately felt that it fit the image of our band, because the simply truth is, we are all greedy for good music".^[2] He suggested the name to his bandmates, which they all found satisfactory.^[3] Monni was formally established in January 2004.^[4] They performed together at Club Sluger for three to four months until the keyboardist quit the band. With Monni's future in limbo, Kim asked former punk-rock band member Gong Tae-woo to join, which he accepted.^[1] Monni released their debut studio album First Day, Light in 2005.^[5] The lead single "Showers" is a song about death and separation, which is based on Kim experiencing the death of a friend from a disease.^[1] The following year, the band was selected as a "hidden master" and were able to perform at the annual Ssamzi Sound Festival.^[1]

After performing at a club in Hongdae, a representative of Soundholic approached Monni and they signed with the record label.^[6] In 2008, they released their first single album Monni: And,.^[7] In midst of preparing for their second studio album, Gong enlisted in mandatory military service and the band saw the departure of drummer Song. The latter was replaced by Jung Hoon-tae.^[6] In Gong's absence, the three remaining members began implementing elements of electronic music into the songs they crafted.^[1] Monni released their second album This Moment in June 2010.^[8] After spending seven years with Soundholic, Monni parted from the company in January 2014.^[9] They decided to leave the record label to "create our own music and reinvest our personal passion into songs that we could truly call ours".^[2] Kim established Modern Boy Records for the band to continue its activities.^[9]

Monni preceded the release of their fourth studio album with the single "Dotnaeyo" on March 11, 2014.^[2] They released Follow My Voice and lead single "In the Moment" the following week.^[10] They celebrated their 10-year anniversary with a compilation album; three of the twenty-two songs on its track list were decided by the band's fans.^[11] Parts one and two were released via online music stores on October 8 and 22, respectively, and the CDs were issued on October 27.^[12]

In 2017, Kim made his acting debut in Blue Busking, winning Best New Actor at the "Golden Cinema Film Festival Award".^[13]

Musically, Monni is an alternative rock band.^[14] Early in its career, Monni's music was noted for its "vibrant, youthful appeal". Their music became "slower" and "more laid-back" over time.^[2] Kim cited indie bands Repair Shop and Cloud Cuckoo Land as his motivation.^[1] He contributes a substantial amount of the band's songwriting and integrates the products his bandmates generate.^[14] Kim's vocals have been compared to Tom Chaplin of Keane.^[3]

List of members and instruments.^[15]

• Kim Sin-eui (김신의) – vocals
• Gong Tae-woo (공태우) – guitar
• Lee In-kyoung (이인경) – bass
• Jung Hoon-tae (정훈태) – drums

Former member^[1]

• Song Ju-hwan (송주환) – drums