Crossover: Pen name: Dazai Osamu, Omega Kasumigaoka

A reincarnated Tokyo boy awakens his memories of his past life.
I discovered that the girl next door is named "Kasumigaoka Utaha," my childhood friend is named "Kato Megumi," my online friend I chat with frequently is named "Kashiwagi Eri," and there's an upperclassman at school named "Sakurajima Mai," who used to be a very popular celebrity...
But before sorting out these relationships, the orphaned boy first needs to fill his stomach.
In the cramped rental room
The thin boy slowly wrote a name on the white paper...
No Longer Human
……
Kasumigaoka Utaha: A writer? I wouldn't dare say that in front of Kitahara-kun!
Eriri: Kitahara, please help me write the story plot!
Megumi Kato: A house, two people, three meals a day, four seasons—as long as Kitahara-kun is there, that's enough!
Mai Sakurajima: During those terrifying and gloomy days, Kitahara-kun was like a guiding light, saving me. It was a stroke of luck that I will never forget!