Her childhood friend Yusaku comes to visit her to return a book he borrowed from her husband. It's been a while since she's seen him, and he has become more manly. She invites him into her house and chats while Shizuka picks up the book he borrowed. Shizuka is Shizuka to see a photo book filled with photos of butts. After Yusaku leaves, Shizuka touches her own butt and thinks that maybe it's pretty good too... so she decides to have Yusaku appraise it. Yusaku says he ca Shizuka appraise it unless it's through underwear, so Shizuka hesitates, but she gets in her underwear. Yusaku's appraisal escalates, and before she knows it, she's sucking Yusaku's dick. Her husband comes home and peeks in on them...