Hachi mo Sasazuba Utare Mai

Suzume is a former delinquent who was the leader of her own gang in junior high school. But when she entered high school, she hid her past to live a low-key normal life. By chance, her secret was found out by her classmate Hotaru. Then, Hotaru asked Suzume to be her friend in exchange for not revealing Suzume's past indiscretions...? (Source: Niconico Seiga, translated)