Writing a Diary in an Anime Crossover World, and Chtholly Broke Down

Yukogawa transmigrates into an anime crossover world where characters from different series live together.

Kiritsugu Emiya is his foster father, and Chtholly is his younger sister.

On his eighteenth birthday, he awakens a diary System.

Writing in his diary makes him stronger, but he never expected it to be read by Yukino Yukinoshita, Utaha Kasumigaoka, Shinobu Kocho, Moka Akashiya, Artoria, Saeko Busujima, Asuna, and many other female anime characters.

Chtholly: "Onii-chan, you said you would make me the happiest person in the world."

Utaha Kasumigaoka: "You said you liked the black stockings I wear best, didn't you?"

Moka Akashiya: "Do you like the clothes I'm wearing?"

Asuna: "Kawa-kun, did you mean it when you said you liked me best?"

Chtholly: "You bunch of damn bitches, stay away from my brother!"

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.