Haruka" got into matching apps with a light heart. One day, her husband brings a subordinate home. To her surprise, it was the man she met on the app. While her husband went out to pick up a forgotten item, they had sex at home. Haruka" repeats erotic acts at home in search of further stimulation. Finally, she decides to blow him while he goes to the bathroom. However, her playing with fire finally leads her into a situation that she cannot get back.