Riona-san is a married woman and mother of two with a voracious appetite for both food and sex. As soon as she arrives at a suburban cottage after being driven there from the city center, she is told to spend time alone with a man who will arrive shortly until she is picked up the next morning. The man who appears before Riona-san, left alone in the cottage, is a virgin college student more than a decade younger than her. In a space isolated from the outside world, the two of them clash their overflowing sexual desires against each other for as long as time allows.