Devil Sister (Thai: แอ๊บร้ายให้นายไม่รัก), is a feel-good romantic Thai television series about love between a girl in the devil disguise and the boy next door starring Pechaya Wattanamontree and Metawin Opas-iamkajorn based on the novel "Beauty and the Guy".^[1] Produced by GMMTV together with Keng Kwang Kang and directed by Ekkasit Trakulkasemsuk and Pantip Vibultham. It was one of the television series for 2022 showcased by GMMTV during their "BORDERLESS" event on December 1, 2021.^[2][3][4] This series officially premiered on April 18, 2022 on GMM 25, it's air every Monday and Tuesday at 8:30 P.M.^[5][6]

Irin (Min Pechaya), the it girl running Bannasorn Publishing House, is crowned "the devil" for her tempestuous and fearless demeanor. But what nobody knows is that it is all an act. The truth is Irin only puts up a mean front just so her younger sister, Inn (Piploy Kanyarat), can stand out and be adored by all. But no matter how well Irin puts on such a cattish act, she can never stop her younger next-door neighbor Namcha (Win Metawin) from falling in love with her. In fact, Irin and Namcha used to date when they were students, but for some reason, Irin broke things off without an explanation and devastated Namcha in the process. Namcha is now a veterinarian working in a hospital, and since he's never forgotten his first love, he's ready to do whatever it takes this time around to get back together with the love of his life. Since Irin won't believe he is still in love with her, Namcha makes it his mission to prove her wrong. Unfortunately for them, this second chance at love is somehow full of obstacles because Inn has also been in love with Namcha for a long time and is working with none other than their family's lawyer Jin (Pod Suphakorn) to sabotage her sister's relationship. Jin himself, through some elaborate schemes, is working to gain the trust of both Irin and her grandfather to take care of the family. And then comes Ploychan (Ticha Kanticha), the owner of a dog farm who's helping Namcha and his hospital with an ulterior motive by using her dog, Action, as a go-between. Love should come easy for the two of them, but family, work, and even friends all seem to tear them apart. How will this love be for Irin and Namcha?^[7]

GMMTV's first attempt at adapting Beauty and the Guy was announced in October 2019. It was titled Devil Sister (รักของนางร้าย).^[19] However, in September 2020, GMMTV revealed that Devil Sister was cancelled due to the COVID-19 pandemic.^[20] GMMTV ultimately decided to revive the project with an entirely new cast, making the official announcement at the "Borderless" event on December 1, 2021.^[21]

The first episode of Devil Sister was trending on Twitter in 8 countries around the world, it's trending number 1 in Thailand, Indonesia, Philippines and Vietnam. Trending number 2 Worldwide, Singapore and Malaysia. Number 16  in South Korea and number 38 in Mexico.^{[22][23][24][25][26][27]} The series has gained significant attention and reached the top spot in the Thai series category on Youku, a popular Chinese video hosting and streaming platform that offers Chinese-language dramas, variety shows and movies.^[28][29]