[HBAD-740] My short-haired, busty, youthful boyfriend's body was so sexy I couldn't resist Ruka Itoi.

My son's girlfriend, Ruka, has been staying over at our house a lot lately, and she keeps peeking around with her big, nice body that doesn't match her cute face, and I can't help but be interested. On the days I stay, I always hear her having sex with my son, so it's hard to resist the urge to peek... Then one day, after sleepover sex, I happened to see Ruka naked in the dressing room when she came to take a shower...