Yuri peeked at the treasured DVDs lined up in her son's room. She had Kokoro checked off the DVDs for her son to wank to, but what was lined up there were a number of mature women movies starring actresses of the same age as her. While she felt awkward knowing her son's sexual preferences, Yuri's mischievous Kokoro rose up even more. If he likes mature women, maybe he'll be excited by my body too... Yuri, unaware that this would be the trigger to open the forbidden door, charged into the bathroom while her son was bathing.