The high school boy and girl from Sundome 2 continue their sexless relationship in which she is sadistic and he is masochistic, but one day there is a rumour at school about her having a relationship with a different, and older, man. The boyfriend feels as if his girlfriend is hiding her relationship with the older man.

The boyfriend of a Japanese high school girl comes to know about the older man his girl is also seeing. The older man pays for a sushi meal for the high school boy. The boy does not want to accept and wants to return the money so begins working part-time at a karaoke bar to earn income. The girlfriend asks him to come over to her place one day. They spend time together, he goes out to buy drinks and when he returns she has disappeared. There is blood in her room.

A teenage boy is a virgin at high school. He has never had a girlfriend so females are a mystery to him. He focuses on his courses, male friends and club activities instead. When a new girl transfers to his new school he, like every other boy, falls for her. They get to know each other.

A teenage girl transfers to a new high school. She and a boy in the class join the same school club and during one of the activities she confides in him that she was previously a male. Later admitting that the sex change was a lie, she agrees to date him as a form of apology. On their first date, however, he finds himself handcuffed by her class-mate.

Hideo Aiba (Atsuji Ninomiya) is a reserved and obedient high school student, who has never had any girlfriend. He spends all his energy on masturbating, his true reason for living. His life and his solitary activities will take a radical change when a new transfer student, the sexy Kurumi Sahana (Akane Suzuki), joins his class.

High school boy and girl are dating. Given her looks, thin body and hair she is popular at school. There is a cheerleader who used to be the most popular girl and is not happy to be runner-up. She wants her popularity back. She tries to trick the other girl. The president of the students' union join the fight.