While his wife went on a one-night, two-day trip with a friend, Kenji was enjoying living alone with a hidden treasured AV. However, soaring into freedom for the first time in a while, he carelessly forgets to lock the front door. There, her sister-in-law Reiko came to play at bad timing. Suspicious of her unlocked entrance, Reiko goes into the house looking for Kenji... and bumps into Kenji who is masturbating in her madness...
