[Highlight] The protagonists are the son of Dazai and Chuuya and the daughter of Akutagawa and Atsushi. They are biological children, but they were born from the Book, not from a human womb. Please take note if this isn't for you.
Influenced by the resentment of readers from the three previous worlds, transmigrators have been appearing in parallel worlds across the anime multiverse and wreaking havoc on the plots until even their own creators can barely recognize them. If this keeps up, the worlds will be in danger of collapsing. After going to great lengths to send the transmigrators back to their original world, the various world consciousnesses discovered that...
They didn't seem able to restore the plots on their own.
So all the world consciousnesses turned to the consciousness of Bungo Stray Dogs: Hey, could you give us a hand?
One day, Dazai Kaoru casually took a book from his father's bookshelf. It was The Complete Manual of Suicide. He opened it and discovered it was the legendary Book.
The Book: Brave young man, will you accept my request and save the world?
Dazai Kaoru: Is there a reward?
The Book: One wish. Name your price.
Dazai Kaoru rolled up his bandages and grabbed his childhood friend. "I'm in!"
The next moment, the boy and girl found themselves standing in the forest on Mount Spider, staring at each other.
Akutagawa Chihiro, dragged into this through no fault of her own, smiled. "Dazai Kaoru, once I've dealt with the enemy, you're next."
Confirmed worlds: Demon Slayer, Detective Conan, Naruto, sports anime crossover, Bungo Stray Dogs, etc.
Kaoru and Chihiro will fall in love. Any other pairings besides Dazai/Chuuya and Akutagawa/Atsushi, if there are any, will be flagged when they come up. Check the author's notes.
Theme: Becoming a better person while saving the world.
