System: Congratulations, Host! You've been chosen by the System. Bind with us and get a package deal on immortality!
Gu Chuan Liangxia: For real? Immortality?
System: Guaranteed immortality, dear.
Gu Chuan Liangxia: Y-yes! Wait, what kind of System are you?
System: A part-time job System~
Gu Chuan Liangxia: ???
P.S. The first world is Detective Conan. Not sure if there'll be a second world. (If there is, it'll be Naruto.)
P.P.S. I know this blurb is ridiculous, but that's the joke, haha. Don't worry, the protagonist will be working part-time everywhere.
Theme: Love life