Ryoko is a married woman who is always serving men, feeling the need to meet their demands. Today, her boyfriend's attitude is different from usual, and Ryoko is nervous about what he will ask of her. When Ryoko simply replies yes to his sadistic words, her boyfriend, without asking her anything, inserts his finger into her anus and then tries to insert a vibrator. Ryoko is too embarrassed to open her legs to accept it, but she opens her legs with all her might, hoping that it will make him happy. Ryoko inserts her boyfriend's penis into her anus herself. A pleasure different from that of a vibrator runs through her body. She can't help but cum as her boyfriend shakes his hips violently. Ryoko is unable to get up, thinking that it feels so good.