After Becoming a Demon, I Accidentally Killed the Demon King in an Instant

[Urban supernatural powers + strategic intrigue + no goody-two-shoes protagonist + no harem + decisive and ruthless + rapid power-ups]

Qin Mo accidentally clicks into a livestream, where the streamer tells him that a monster-eating-humans incident just happened at the bar he visited, and he was the only survivor. With a peace charm in hand, Qin Mo assumes he’ll be safe, but in the middle of the night, his landlady, Sister Zhang, calls him over...

“I never believed monsters existed in this world, until I became one.”