[Third-person narration]
I, Tsukizuki Kazuki, am a book spirit, but I was born into a world where literature is in decline.
But what does that have to do with me?
I'm just a useless book spirit obsessed with manga.
After immersing myself in the world of manga, I come to and discover that a page is missing from my body.
I hurry to my immediate superior, the Book God, to complain.
The Book God waves a hand and stuffs me into the body of a manga character, then throws me into the manga world to search for the missing page.
And when I realize I'm wearing the skin of the male lead from a silly, sweet manga, but I've ended up in a high-risk shonen manga...
Help, I got the wrong anime!
[The Jujutsu Kaisen world]
A boy followed by a white special-grade cursed spirit appears on the streets of Tokyo.
"Please don't hurt him! Mr. Kanenogi isn't a curse that harms people!"
When asked who he is, the boy with red highlights shyly hugs the silent curse.
"I-I'm his bride..."
[The Detective world]
A red-haired man in a hat leans against the counter at Café Poirot and drains the last of his coffee.
On his way out, he casually catches a grade-schooler who is about to fall.
Watching him leave, the little boy quietly puts on an earpiece connected to a listening device.
The voice of a silver-haired hitman comes from the other end.
"You're too slow, Petrus."
...Other worlds under construction...
Premise: Don't be so absentminded that you lose things.