Masahiro Setagawa, a high school student and errand boy for a gang, worries about his life going nowhere until his homeroom teacher, Kousuke Oshiba, steps into his life in an unexpected way.

Kensuke and Setagawa find people from their pasts re-entering their lives.

Hasekura seeks to make up with Kensuke.

Kensuke settles on his feelings for Hasekura; Setagawa must deal with his own feelings.

Setagawa examines his past to settle his conflicting emotions about Kousuke.

Setagawa must reconcile the consequences of his past; Kensuke attempts to be a good friend.