As a child, Sasahara Tomo has always been "one of the guys," hanging out and rough-housing. Even though, she secretly wished to be a girl instead when she enters elementary school, she keeps her facade, too embarrassed to admit it. But when her love confession was later rejected because she didn't seem like a girl, Tomo was ready for a new start. And how lucky that she's about to enter high school. She's excited. A whole school where nobody knew her! But not quite. There's Shimazaki Akira, who had been her next-door neighbor until 5 years ago.. and it seems as if their "sibling" regard for each other is growing into something more.. But there are problems aboard.. because this is a forbidden love.. because he is her 23-year-old class advisor.

Mei and Takeru are twins who have a very close, if slightly flirty, relationship, and are quite popular within the school. Their relationship is both a source of amusement and dismay to both the male and female school population, especially with Mei, whose massive brother complex keeps her oblivious to serious confessions from other males. Their relationship becomes even more complicated, however, when the two of them learn that they are not related by blood.

The love-love romantic comedy, "Osuteki Darling," of Kaibara Serika and her two-year-younger boyfriend, Aoki Taiki, makes a powered-up appearance. After dating for two years, Serika has become a college student and Taiki is studying for exams. Even though their circumstances have changed, their love-love hasn't changed. At least, it shouldn't have, but now Serika is being dragged into conversations about having an arranged marriage!?