Ayaka Muto, the fifth-generation proprietress of a long-established ryokan, is renowned for her beauty and exceptional management skills, keeping the inn fully booked a year in advance. However, her personal life tells a different story—after a failed marriage, she now lives as a single woman devoted entirely to her work. In private, she finds solace in using a vibrator, but as she ages, her sexual desires grow stronger, leading her to become increasingly dependent on it. Noticing her insatiable side, a group of men devise a plan to train her outdoors and dominate her with real cock.