Yamete, oshiri ga itai's manga / #Deliquent(1)

Saikyo Yankee to Makeinu na Ore

Complete | Akatsuki Amama | 2000 released

Kiyonaga Akane, a new delinquent who’s weak at fighting but has a strong will. One day, he got beaten up by Yankees from another school, then, his hero – Kidou Ryouji and Kurokawa Tarou saved him. They became closer and Kurokawa keep teasing Akane every day. Not only that, Kurokawa also do perverted things with Akane?!