She's been married for five years. Her husband is indifferent to sex, and she feels frustrated. Ayano feels like she's wasting her body, which is still in its prime. One day, the couple decide to go on a trip to a hot spring with their local neighborhood association. On the first day, Ayano is drugged with sleeping pills at a party, and while she doesn't seem to wake up, she is gang-raped by a group of virile old men, and awakens to a certain pleasure. "Normal sex just isn't enough for me anymore..."