Working for the Demon King Is Seriously Life-Threatening

I'm just a regular high school student, so how did I suddenly end up working for the Demon King? This Demon King is more heartless than any boss. I haven't even graduated yet, and I'm already going to become a corporate drone.

I'm just a blurb, what more do you want from me? Come read it! I won't let you zombie kings [struck through] down!

Get ready for a hilarious, passionate, and exhilarating urban fantasy adventure!