Ore ni Horeta to Ittekure!

A love fight between a crazy, devoted Yankee and a high school girl working part-time at a pharmacy!

Yankee Shishio is challenged to a fight and (even though he wins) is injured to the point of bleeding from his head. While stopping by a drugstore, he falls in love at first sight with Maya, a part-time worker who talks to him without any fear and even worries about his wounds, and he can't help but confess his feelings! But she rejects him, saying, "Yankees are a bit..."

(Source: Kodansha, translated)