One year into their relationship. Shinya was invited to his girlfriend's house for the first time and arrived earlier than planned due to nervousness. He hesitantly pressed the intercom, only to be greeted by his girlfriend's mother, Yuu, instead of his girlfriend herself. Since his girlfriend had just gone out shopping, the two ended up waiting together. Shinya couldn't take his eyes off Yuu, who exuded a mature allure. Noticing Shinya's gaze, Yuu impulsively decided to seduce him...
