Seri-chan, congratulations on your first penetration in preparation for admission (holiday) Seri-chan will soon be in ○ grade. Today, I went to the school's designated uniform store with my mother. This is to get me measured for a new uniform. However, the uncle of the store clerk who fell in love with the cute Seri-chan mischiefed him in name only. Furthermore, the act escalates, and the 'virginity' that was supposed to be given to her boyfriend is stolen...