Teen ager Kazuki Miyaichi has felt unloved by her own mum because the circumstances surrounding her arrival. Because stress is harbored by her and punishes herself as being useless to the others, she participates in acts of juvenile delinquency. One afternoon , a transfer student from Yokohama named Eri introduces her to Hiroshi Haruyama, a reckless youth who's an associate of the"Nights" bicycle gang. Kazuki finds herself increasingly drawn to Hiroshi as time passes, but he soon becomes leader of the Nights and gets swept up in a battle with a rival gang.