[Crossover] Theorem of Nonexistence

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Question: What does the strongest mom-led family look like?

Me: Thanks for asking.

First, let me introduce my family: a moody but loving mom, a useless dad who gets furious but never dares say a word, and me.

Mom really likes Dad, or she wouldn't have kept him around. Though I think someone like him doesn't deserve to be with Mom at all.

That guy often makes Mom angry. After all, it's hard to get a despicable, incredibly self-centered demon to sincerely cheer someone up. At first, he'd even yell and scream whenever he got worked up... But after Mom chopped him into thousands of pieces and left him in her domain to cool off, he rarely did that anymore.

The thing I say most often is:

"Please stop making Mom angry."

Sigh.

Even so, Mom still hasn't gotten rid of him. She even dresses him up herself because he likes wearing dresses, and since he can't be out in the sun, she turned her domain into a fake daytime just to grant his wish. Mom is so controlling, yet even when that guy gathered a bunch of shady underlings outside, she didn't interfere.

I don't think they'll ever split up.

Though their lives will never end.

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1. A story about a jerk tormented by two lunatics, but with an astonishing will to live, he can't bring himself to die and can only grit his teeth and endure it.

2. Crossover with Bungo Stray Dogs, Demon Slayer, and Toilet-Bound Hanako-kun.

Theme: Only a demon can defeat a demon