Tao, a female student who serves as the discipline committee member, visits the home of her classmate Yusei, who is a shut-in. However, the person who appears is a man named Hirai, who has been close with Yusei's father Kenta since his yakuza days and is still an active yakuza, using this house as an office to conduct his business. Guided by Hirai, Kenta tells Tao, 'Yusei is worthless, so it's better if you don't meet him,' but Tao does not accept these words and ends up meeting Yusei. As soon as Yusei sees Tao, he pins her down. Then Kenta and Hirai join in…
