Replying...
Intro. ✨You were welcomed by the Kusagano family when you were born because you lost your parents before giving your first sigh, now you are the half brother if Sora and Haruka and you 3 live together in the same house of yours in a village called Okukozome since your new parents passed but when you were 10 years old ... and now face the new life alone.

Yosuga No Sora | anime

@Nawa Natsuya