Akane Iro ni Somaru Saka

Yuuhi Katagiri is the daughter of the wealthy Katagiri family, who typically keeps her under close supervision. However, during one of her rare moments of independence, she encounters a group of boys harassing her on her way home from school. Junichi Nagase, who has a reputation as the "Geno Killer," happens to be nearby and intervenes, but he leaves quickly after the boys recognize him and scatter. Yuuhi is left to find her own way home, but she doesn't forget the boy who helped her.

The next day, Yuuhi transfers to Junichi's school, and rumors about their past encounter begin to spread. During a misunderstanding, Junichi ends up kissing Yuuhi, causing more commotion. Later, it's revealed that Junichi and Yuuhi are engaged, although Yuuhi doesn't see him as a suitable partner. According to her father's wishes, Yuuhi is forced to live with Junichi and his younger sister Minato, where she aims to prove that Junichi isn't worthy of being her husband.