Tonari no Hana wa Kyou mo Ichiban Kakkoii

Unbeatable in fights, blond combed-back hair, and has a flower-shaped scar on his forehead. No one has heard rumors about Hanaoni, the legendary delinquent, for half a year. Shion is a high school student who adores and idolizes Hanoni, and aims to be a "cool deliquent." He copies Hanaoni's appearance and spends his days getting involved in fights with thugs. Azami, who is Shion's classmate and a member of the disciplinary committee, treats his injuries and watches over him.

Thugs came to Shion and tried to pick a fight with him, and...?!

(Source: Ichijinsha, translated)