Ep. 1: Innocent Yuzu discovers her stepsister Mei kissing a teacher on her first day
Aired on January 6, 2018

Aihara Yuzu appears as a fashionable gal but is actually an inexperienced high school student with no romantic history. After her mother remarries, Yuzu transfers to the elite Aihara Academy. On her first day, she witnesses the diligent student council president, Aihara Mei, kissing her attractive homeroom teacher. Distressed by this sight, Yuzu returns home. Her mother then reveals that Mei will become her stepsister and they will share a bedroom. Yuzu struggles to hide her upset feelings as she faces this unexpected living arrangement with the girl she just saw in a compromising situation.
Episodes
- Ep. 1 · Innocent Yuzu discovers her stepsister Mei kissing a teacher on her first day
- Ep. 2 · Yuzu Pursues Mei to the Chairman's Mansion After a Stolen Kiss
- Ep. 3 · Yuzu confronts her love for Mei and seeks to save the chairman
- Ep. 4 · Yuzu struggles with guilt after kissing Mei, while Himeko reveals Mei's deep sadness to her.
- Ep. 5 · Yuzu Competes for Mei's Lunch While Harumi Invites the President to an Amusement Park