Kasumi Shirakawa, a married woman who met through a dating app. Fifteen years into her marriage, she had been so consumed by raising children that she hardly had any time for herself. But now that her kids were starting school, she gradually began reclaiming personal time—enjoying meals and shopping with friends, experiencing pleasures she'd long missed. Still, she felt lonely, no longer seen as a woman by her husband, and started indulging in flirtations with strangers through dating sites. One day, using a visit to her parents' home as an excuse, she decided to go on a hot spring trip. What followed was an overnight journey of unrestrained desire, letting go of her pent-up frustrations and losing herself in relentless, creampie-filled ecstasy.