Seven-year-old Zenin Toji, bound to the Fate Rewriting System, chose to transmigrate.
Toji: No matter what, it can't be worse than that dump called the Zenin clan, right?
System: I guess not. QAQ
And so.
The world of Detective Conan:
Toru: Solving cases with violence is unacceptable. Don't just use the Great Memory Recovery Technique whenever you want!!!
The Black Organization's hardest worker: You're talented. The organization needs you.
Toji: Thanks, but no thanks.
The world of man-eating demons:
Red-Haired Owl: Excellent, you're full of spirit. The Demon Slayer Corps needs talent like you.
Toji: No, not interested. (Why do these organizations love recruiting so much? Isn't betting on horse races more fun!)
The gentle-voiced leader: The salary is excellent if you become a Hashira.
Toji: Sure!! Which demon do I kill? I'll get right on it!
After extensive training and maxing out countless skill points, the Heavenly Restriction user returned to his original world.
The Zenin clan, huh? You look down on people without cursed energy, do you?! (sharpens knife)
Theme: No fate is unchangeable.