Teenager Kazuki Miyaichi has always felt unloved by her mother due the circumstances surrounding her birth. Because she harbors anxiety and perceives herself as being worthless to others, she engages in acts of juvenile delinquency. One day, a transfer student from Yokohama named Eri introduces her to Hiroshi Haruyama, a reckless youth who’s a member of the “Nights” motorcycle gang. Kazuki finds herself increasingly drawn to Hiroshi over time, but he soon becomes leader of the Nights and gets caught up in a conflict with a rival gang.

S.W.O.R.D. Chiku is a devastated and dangerous town with 5 gangs – Sannoh Rengokai, White Rascals, Oya Kohkoh, Rude Boys and Daruma Ikka – fighting fiercely. The name S.W.O.R.D. comprises of the first letter in each of these gangs. Before these 5 gangs, the legendary Mugen gang dominated the town. Mugen and the Amamiya Brothers (who did not submit to Mugen) clashed and Mugen disbanded, but …