HMN-919 Her sensitive older sister, Rin Suzunoya, has her small nipples discovered by her younger brother… and is teased while being thoroughly fondled, reaching climax multiple times and experiencing repeated intimate encounters

When I was at home with my older sister, my hand accidentally brushed against the tip of her chest. For a moment I thought, Oh no! but then she suddenly jolted, started trembling, and ended up soaking herself. Huh? It was only a light touch, but is my sister’s nipple that sensitive? Her reaction was so easy to trigger that it was amusing, so I kept teasing the sensitive spot in various ways, and after making her even more responsive, she started wanting me, and I ended up having sex with her.