Yuuya Gokaki, the eldest son of a large family and a caring high school student, decides to live his dream of living alone. But from the first day, his ex-girlfriend (?) Banasera comes running in. Moreover, ...

Ageha's older sister is getting married. But Ageha, who suffers from an enormous sister complex won't accept it. One day, in order to get Ageha more involved in the wedding preparations, her sister takes her...