Nitta, whose wife is due to give birth in a week and is currently visiting her parents' home, reunites with Yuna, who was the most popular girl in high school and is now married, at their high school reunion. The two hit it off and, given that they were both single at the time, end up crossing the line. From that day on, a demonic woman who mounts my wife and forces me to ejaculate inside her starts draining my sperm every day...
