Demon Slayer: I'm Sorry, but I'm Not Your Brother

"Cb towards" family affection! Family affection! Family affection! Ichiro: Have you seen it all? I'm sorry, I'm not your brother... Muichiro: No, you are! … Ichiro: What is your purpose? ! System: Guess (bad smile) Ichiro: It doesn't matter, let's die together! —————————— The modern Ichiro is a fan of Kasumashira Tokitou Muichiro in the anime. Because he was selected, he was taken to the world of Demon Slayer and became Muichiro's brother, and his journey to another world began. When can I go back to the modern world: One of the necessary conditions is to get full favorability with Muichiro - at least that's what the system says. There is a system, but this system is not a system (the name of the system is just to make Brother You relax his vigilance). Forgive me for not saying what it is specifically in the introduction, otherwise it will be a spoiler (cover your face and laugh) Please review the book, please update, please review the paragraph! The more red dots there are, the more updates I will make~! (Damn it, after signing the contract, you can only change the profile, but you can't change the names and tags of other protagonists, crying)