Urban: From the Start, I Merged with the Demon Emperor and Became Invincible

[Invincible Protagonist] [Endless Thrills] After angering the school bully, he is blown to pieces, but unexpectedly merges with the soul of a Demon Emperor and embarks on a path to turn his fortunes around. He hunts ancient martial arts masters and ascends to the peak of the Immortal Emperor realm. With the Thunder-Controlling Sword Art in hand, he dominates the city and the school. Empresses, demon queens, campus beauties, mature women: all of them are his for the taking.