Wife Iori's marital life has come to a halt due to her husband's erectile dysfunction, leaving her restless and frustrated every day. Learning of their situation, her father-in-law grows anxious about never seeing a grandchild and obtains a potent stamina-enhancing drug for them. When he casually takes it himself, the effects are extraordinary—his erection returns with vigorous strength. Noticing this sudden change while caring for him, Iori is shocked by her father-in-law's transformation and begins to feel a new sense of closeness. His renewed vitality becomes an unexpected catalyst, drawing her to his body under the guise of caregiving, and before long their relationship takes a sudden turn into forbidden intimacy... #Captain P