Chiaki drank beer laced with an aphrodisiac given to her by a neighbor. The drug took strong effect, driving her to vigorously masturbate, but it wasn't enough to satisfy her urges. When her son returned home, she seductively dressed as a beer girl and offered him the spiked drink. Mesmerized by his young, hard penis, she couldn't resist and took it into her mouth. Then, she teased, "Do you think you can come that easily? You'd better pleasure me too," before mounting him and grinding her hips lewdly until she climaxed.