Imoto Connect, Chihiro Arimura

My sister-in-law's graduation trip was between me and my brother and sister. We have been living as an ordinary brother and sister until this day after we crossed the line of our older brothers and sisters a few years ago. However, this was the day when I ended my relationship with my sister. A day to become a lover from my brother and sister. I was pouring a lot of zurmen into my sister.