[Donfu/izona] She Is an Islander

A love story between a sister and a brother who was brought together by Shinichiro. Because it was Makoto/Sano-san who introduced us to each other, I have always cherished the story of tolerance and finally getting myself involved. It's a very short story that came out of nowhere. I don't know where I can go. It's August and Sano's three brothers are about to give birth. Intention: A birthday song for Isana