Ataru, left alone to stay at home while his parents go on a two-night three-day pair trip they won in a raffle. His mother's acquaintance is supposed to come over and take care of the chores and meals, but who shows up is none other than Yuna, a sexy woman exuding charm that doesn't seem like she could be an acquaintance of his plain mother at all. Ataru is instantly captivated by her beauty and schemes to keep her in the house. Thus begins the long and erotic night for Ataru and Yuna, just the two of them.
