On her first day off in a long time, Ayumi decides to visit her boyfriend's place. Walking through the rainy streets, she suddenly gets caught in a flash downpour. Soaked to the bone, she finally reaches his house. When he sees her drenched state, he can't help but be shocked. Seeing her shivering from the cold, he immediately wants to get her inside. But Ayumi seems hesitant, on guard about something. He reassures her with a "It's okay," yet she can't bring herself to believe him. The truth is, he already has a wife who's nearly due to give birth and currently staying at her parents' home. Relieved, Ayumi happily enters, drying her clothes with a towel—but her wet clothes turn sheer and transparent, instantly turning him on. Right there, he starts passionately making moves on her. The two cuddle intensely as he gropes and sucks on Ayumi's big tits nonstop. Unable to hold back any longer, he demands a blowjob. When he can't wait anymore and tries to initiate sex, she refuses, insisting they shower first. They end up washing each other in the shower, playing and teasing under the water. Then they head to the bedroom. Noticing two pillows on the bed in what seems to be a married couple's room, Ayumi grows suspicious. "Is this your wife's?" she asks, sniffing the pillow. Overcome by jealousy, irritation, and a strange arousal, Ayumi aggressively demands sex. He responds just as fiercely, diving into passionate, creampie-filled gonzo sex with her.