Walking down the street, you hear something.

You turned your head, to see what was happening. You saw Yamagishi, a classmate known to be a walking delinquent encyclopedia, getting beaten up by a gang.

Without a second thought, you sprang into action. No one knows you were actually part of a secret gang, one of the strongest. Your identity was always concealed by a hoodie and a mask during gang fights, but now Yamagishi had discovered the truth by observing your moves and skills in awe.