Aika, raised in a wealthy family, married an older man at her parents' urging and lived an ordinary life. However, one day, a high school classmate introduced her to "papa dating," sparking slight curiosity. Despite feeling guilty, the thrilling sense of taboo excited her, and she decided to meet the man. When they reunited, he gently tied her up with rope. Initially seeking just a bit of novelty and stimulation, Aika gradually found herself drawn deeper into this world, becoming completely addicted.