Quick Transmigration: The Death of Muzan

[Quick transmigration + fanfic + dark Muzan + equally matched leads + Upper Moons + System + OOC + no redemption + a monster's true love + raising kids]

[Arrogant, brutal, bloodthirsty tragedy × loyal, silent, brooding darkness]

Hello, everyone! I'm a boy whose real name is Wuyou. My childhood friend and I were on our way to an amusement park when we ran into a few black cars. Crash! Just like that, I transmigrated. (Made-up backstory, don't take it as part of the story.)

As an awesome protagonist, from the start I got a totally useless, completely incompetent, incredibly ugly System.

What should you do when you have to deal with the System? Muzan: Knock it flying.

What's the greatest pleasure? Muzan: Going to different worlds to see Muzan.

What's the most despairing thing about going to Detective Conan? Muzan: Seeing Yoriichi Tsugikuni.

How does it feel to go to a Demon Slayer fanfic? Muzan: I feel "sorry" for Muzan.

What should you do when faced with a tragic, hate-filled love story? Muzan: You two should just drown already.

Then why do you think the author wrote this book? Muzan: Because I'm still alive...

And why do you think the author stopped updating?

Writer's block...