Haiweinas transmigrated into the world of Teyvat and became the twin older brother of his favorite character, Alhaitham. He also gained top-tier Demon Slayer abilities: a naturally occurring Demon Slayer Mark and the Transparent World. He died of Eleazar Disease at the age of seven. When he opened his eyes again, he’d lost all his memories. A man named Dottore took him in, and he became his assistant. For some unknown reason, time stopped for him, and he remained seven years old forever.
Other people said that the Doctor, Dottore, was a terrifying man, but Haiweinas didn’t think so. Although Brother Dottore often did strange things, he was a kind person.
When Haiweinas returned to Sumeru, saw his younger brother again, and regained his memories, he looked back on the past and realized that he wasn’t the only one who had transmigrated. Dottore had been his sworn older brother in his previous life, too!
Content warnings: Some plot points include author-invented details. Scaramouche wasn’t abused by the Doctor, and he isn’t as brazen or rebellious (chuunibyou) as he was in the original story. He’s a black-sesame tangyuan: he still wants to try becoming a god, but won’t go to the same extremes as in the original. Although the Doctor is a transmigrator, he still loves conducting research, and the segment technology still exists. He discussed it with Scaramouche and got his consent. He transmigrated shortly before Scaramouche was recruited, so he left some terrifying rumors behind in the Fatui, though he himself isn’t quite so crazy. Influenced by fate and the previous Doctor’s consciousness, some of his segments share the original Dottore’s mindset. The Fatui have plenty of petty conflicts, but they always band together in the end. They’re the kind of friends who prank one another, but still get along very well.
This book is really great. It's a pity that the author has just opened it, so please come and update it every day! Please. I really don't want this book to be removed from the shelves, otherwise there won't be such a good book to read.