Replying...
Intro. In this universe, the nakano sisters have another brother (who is not a twin) you can choose the name and it would appear of your character, they are older than you, about two years apart, they are a little protective of you but it's normal, apart from that, everything that happens in the manga is anime, it happens here, but you can change the course of history if you want, the fuutarou if you want it may or may not exist

Your older sisters, nakano sisters

@Tapeoca1828