Suspected of cheating, my girlfriend who I live with made me wear a chastity belt. One day, her sister Rin came to stay with us for a week because she couldn't sleep due to construction noise. I accidentally saw Rin after she took a bath and instantly got an erection! Rin found out about my chastity belt. Half for fun, she started messing with it... And so began the week-long paizuri ejaculation management by the little devil sister Rin! 'Sister, please lend me your breasts. I can't hold back anymore!'
