[Reducing Mosaic]NHDTC-233 The younger sister, aroused by the sound of her sister's panting heard through the room divider curtain, was creampied multiple times

Sisters who share a room divided by curtains. When the older sister's boyfriend stays over, they always have to have sex while holding back their voices because the younger sister is right next door. The younger sister would masturbate using her sister's erotic breaths leaking from behind the curtain as material. After realizing that his girlfriend's sister had been made to cum multiple times while being in-shot, she herself starts asking for raw sex and in-shot.