AMBI-130 Brother-Sister Complex When the Sister Got a Boyfriend Yuisei Yui

"Anyone who looks at their real sister with sexual intent is a freak." I used to think so too. Until my sister got a boyfriend... No matter what my sister was doing, I didn't pay much attention, and in fact, having fewer conversations and points of contact made things easier. That was the distance between us. However, when I heard her talking on the phone with her boyfriend or found cute underwear she hadn't had before, I realized that different feelings were starting to grow within me...