Exclusive third release! Kiho Ichimiya's drama debut! My electricity and gas were cut off, so I stayed at my girlfriend's house. She has a sister who seems to be wary of me. That night, after being rejected for sex by my girlfriend, I was caught masturbating by her sister! Since she seems easy to push, maybe I can fuck her too... I secretly fucked her sister for a week while my girlfriend was away. Her sister's temptations escalated day by day.