Gojo Arina (Kouta Nomura) aims to become a doll maker, but because he is too focused on dolls, he has different interests from his peers and cannot integrate into the class.One day, the sewing machine at home broke down and she couldn't make clothes for the doll. She thought of going to the school's costume room to borrow a sewing machine.

In the empty clothing room in the morning, Aina is making clothes, and the class star Kitagawa Ummu (Nagase Riko) appears.Hai Meng is a lively hot girl who lives in a different world from Xin Cai.Seeing Xincai making clothes, Haimeng teased him, and Xincai was so surprised that he dropped the doll to the ground.

Because of the psychological trauma caused by past experiences, Xincai hurriedly hid the doll, but Haimeng's reaction was beyond Xincai's expectation. She praised the doll after seeing it.

Suddenly, Haimeng said to Shina: “I want Gojo-kun, who can sew, to see this thing”, and then Haimeng started to take off his clothes——