Violence na Partner

Makiko is a former delinquent. She is so strong that she has never lost a fight. However, upon graduating from junior high school, she quit, saying she wanted a normal relationship. She dyes her hair black again and tries to become a cute girl, but she just can't find a boyfriend. Then, when she is being harassed by a man trying to pick her up, she falls in love at first sight with Hashimoto-kun...

(Source: Shogakukan, translated)