Aoki has a crush on Hashimoto, the girl in the seat next to him in class. But he despairs when he borrows her eraser and sees she's written the name of another boy—Ida—on it. To make matters more confusing, Ida sees Aoki holding that very eraser and thinks Aoki has a crush on him!

The hardened veteran detective Rena and bright-eyed rookie Sato take on a menial investigation. The job goes well until a thug named Dobu steals their evidence. Disheartened, they take a job looking into the life of a taxi driver named Odokawa in hopes of redeeming themselves. They wind up in the middle of a missing girl case, with gangsters, aspiring students, and surprises around every corner.

The story is set in a big hospital which is infiltrated and taken over by an armed group wearing devil masks. Musashi Saburo a police officer on leave of absence has to save the hostages within a set time limit.

The story of a 15-year-old junior high school student. Hiroshi transfers from a private school to a public one in order to emulate the delinquents in his manga books. On his first day, he's challenged by the school's most notorious delinquent, Iguchi Tatsuya, and ends up beaten and caught by a detective. He finally gains recognition by winning a one-on-one fight against a student from another school, and joins the ranks of delinquents, leading a life of fighting against other schools.