After Winning Over the Seven Deadly Sins, the Boss Came After Me [Western Fantasy]

Blurb:

The seven city lords are incarnations of the Seven Deadly Sins, while Bu Luoning is the Holy Son of Light. His mission is to eliminate the seven city lords and bring light back to the seven dark, sinful cities. But he has no special abilities or allies. He's just a penniless student saddled with the title of Holy Son of Light.

Bu Luoning: Can I just kill myself?

Heaven's Will: Of course, if you don't mind the trouble.

Bu Luoning: What does that mean?

Heaven's Will: Since you haven't completed your mission, dying ten thousand times won't help. On your twentieth birthday, you'll still become the Holy Son of Light. It's a vicious cycle, and there's only one way out: complete your mission.

Bu Luoning: @&×#@×! You're really something!

With no other choice, Bu Luoning had to accept this ridiculous, godforsaken mission. After finally completing it, the Big Boss of the Seven Deadly Sins came knocking!

Boss: You think you can run after you tricked, swindled, and seduced me...?

Note: The Seven Deadly Sins are personified in this story.

Theme: Savior