Assisting a sister who, after being dumped while living with her partner, goes home and engages in NEET-induced masturbation, triggering a frenzy of nipple masturbation. (Kuramoto Sumire MIAB-080)

My sister broke up with her live-in boyfriend and suddenly went back to her parents' house. She's selfish, very selfish, but she's also very charming. Seeing her like that made me nostalgic. When I called my sister, who was relaxing in my old room, she was masturbating by rubbing her nipples. I'd never heard her panting before, and it made my penis hard. And then my sister discovered I was peeping…