Douluo Continent: I, an evil soul master, work nine-to-five in the Tang Sect.

[Douluo Continent II: The Peerless Tang Sect Fanfiction]
Luo Chen, who was favored by death, had the ability to absorb the life force of others to replenish himself since he came to this world. He was once regarded as an evil soul master and was hunted down.
Everything calmed down when he was taken in by a sect. After that, he was introduced by the sect to Shrek Academy, the number one academy on the continent, and rightfully acquired a new identity. The name of this sect was Tang Sect!
……
A member of the cult asked, "We're all evil spirit masters, so why are you allowed to be a student at Shrek Academy?"
Luo Chen: "You can question me, but you can't insult me. I've never killed a single person, how dare you assume my identity!"
"I, Luo Chen, am forever loyal to the Tang Sect! Loyal!!"