The lucky guy was invited by Nao Jinguji to stay home for the night. After a party, this guy missed the last train home, and one of her colleagues, Nao Jinguji, invited him to stay at her place. He didn't think much of it at first, especially since he had a girlfriend. But the sexual innuendo and teasing begin to increase rapidly and he eventually gives in to temptation. And then the two made love from night to morning and will this relationship continue or not.