- Josh Grelle as Masamune Makabe
- Morgan Garrett as Aki Adagaki
- Monica Rial as Yoshino Koiwai
- Justin Briner as Kojuurou Shuri
- Skyler Davenport as Chinatsu Hayase
- Natalie Hoover as Kinue Hayase
- Caitlin Glass as Tae Futaba
- Jeannie Tirado as Mari Mizuno (episode one)
- Tia Ballard as Kaneko Sonoka (episode one)
- Dawn M. Bennett as Kikune Kiba (episode one)
- Daman Mills as Akio Tanabe (episode one)
- Aaron Dismuke as Shigeo Yamada (episode one)
The English dub will premiere on Monday at 9:30 p.m. EST. The series premiered on January 5 and Crunchyroll is streaming the series in Japanese with English subtitles as it airs in Japan.
Mirai Minato (Fate/kaleid liner Prisma Illya) is directing the series at SILVER LINK. Michiko Yokote (Shirobako, ReLIFE, Dagashi Kashi) is supervising the show's scripts, and is also penning them alongside Kento Shimoyama (Good Luck Girl!, Servant × Service, Shomin Sample). Yuki Sawairi (Yuri Kuma Arashi, Girl Friend BETA animation director) is designing the characters for animation. Toshiki Kameyama (Kan Colle, Kiznaiver) is in charge of sound direction. Lantis is credited as music producer. Ohashi is performing the anime's opening theme as her character Aki Adagaki. ChouCho (Hyōka, Girls und Panzer) is performing the ending theme song.
As an overweight child, Makabe Masamune was mercilessly teased and bullied by one particular girl, Adagaki Aki. Determined to one day exact his revenge upon her, Makabe begins a rigorous regimen of self-improvement and personal transformation. Years later, Masamune re-emerges as a new man. Handsome, popular, with perfect grades and good at sports, Masamune-kun transfers to Aki's school, and is unrecognizable to her. Now, Masamune-kun is ready to confront the girl who bullied him so many years ago and humiliate her at last. But will revenge be as sweet as he thought?Writer Takeoka and female Korean artist Tiv (Heaven's Memo Pad manga) launched the series in Ichijinsha's Monthly Comic Rex magazine in 2012, and the manga is headed toward its climax. Ichijinsha shipped the manga's eighth compiled volume in Japan on January 27. Seven Seas released the manga's third volume in English in December.