Seiran Gakuen is an exclusive private boys' high school. It's the start of the summer break and Yoshikuni has decided to spend this year's summer at the school's Shoraikan dormitory, as have Mitsuhiro, Kanji and Iwatsuki. All four boys have their own reasons for not going home.
Yoshikuni's girlfriend is Hiroko, but with his own reasons, he tells her he doesn't want to see her for a while. Hiroko isn't satisfied with this but Yoshikuni keeps on avoiding her.
On their first day, Yoshikuni and Mitsuhiro set out to buy food for dinner. They bumped into Osamu, a day student. Hiroko and her friend Aki turns up. Aki ask Yoshikuni why he dumped Hiroko for no apparent reason. Hiroko can't take it any more and bursts into tears. Takagi who lives in the dormitory next door sees this. Some days later, Mitsuhiro's step-mother Keiko visits the Shoraikan dormitory. He is cold-hearted towards her, like a different person.