Delinquent Dragon

by FirstRuler

Summary:
Keiji Hiryu was just your average "delinquent" trying to get through high school life at Kuoh Academy, solving his problems as best as his fists and temper could let him.

That is, until Rias Gremory came to him with an enticing offer to solve his problems in exchange for joining her...as a Devil. As this generation's Red Dragon Emperor and with little patience for people's bullshit, follow his tale as he faces dangers, madness, monsters, world-ending threats, and women. Lots of women.

(Lemon-heavy story with plot)