After sleeping for a thousand years, Su Yu Nie discovered that the times had changed and he'd become a little boy.
Him: Thanks for asking. I'm not happy about it at all.
Luckily, his ghoul friends (munch munch) had come along too (munch munch munch).
Then let's call it a vacation!
What are you asking about him chewing? Relax, it's just hair noodles~
Next, Su Yu Nie will demonstrate for you:
What to do when you run into [redacted]? Get them to bury you on the spot and save yourself decades of detours.
What to do when you run into a monster? Use the language of kindred spirits to steal their people and loot their home.
What to do when the jujutsu world exploits minors? Hello, emergency services?
Hahaha! Great, we got a day off in lieu. We're doomed!
Later...
Nine-Bag Noodles: I'm scared to go. I feel like I'll die...
Su Yu Nie: Need me to perform a corpse-driving ritual?
Rikuo: I heard you can use word spirits too?
Su Yu Nie: Yeah. I can make someone suddenly lose control of their bowels.
Weird Bangs: I'm in my summer depression...
Su Yu Nie: Try some fly agaric mushrooms. It'll bring back your appetite and let you see little people.
And after that, the whole world changed, but the tone was a little strange.
It felt like Lin Daiyu and Zhang Fei had set off together to fetch the scriptures in the West.
The 5t5 who'd been led astray by Su Yu Nie: Personally, I think cursed spirits should be paired with grade 42 concrete, then fried until the cross-section reveals the Pythagorean theorem, and served with trigonometric functions to those rotten oranges and brain paste.
Tsuna, who's given up struggling: Could you tell me in advance next time you're going to release ghosts? If I go to sleep right where I am, I won't see them, so I won't be scared...
The numb bandage-wasting device: Tell your friend to leave, thanks. I don't want to die for love with a shameless (in the literal sense) young lady, thanks.
Villain: I'm already sauce. Don't @ me.
Note:
The original protagonist is a powerful, scheming great demon from China. He's crazy every day, but there are always people on his wavelength.
No romance.
A crossover with many anime series. The main storyline should be in the jujutsu world, which is great for supernatural stuff.
There will be lots of Chinese horror elements, but it won't be especially scary.
The main goal is to traumatize everyone. (Author status check.)
Theme: Check the protagonist's mental state with one click.