TONARI NO HANA WA KYOU MO ICHIBAN KAKKOII

Tonari no Hana wa Kyou mo Ichiban Kakkoii summary:

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 highschool 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…!?