Since his wife died three years ago, Mahiro’s father-in-law has lost his spirit and apparently developed erectile dysfunction. Supplements, exercise, and countless other remedies have failed, despite his determination not to worry his late wife in heaven. Unable to stand by and watch him suffer, Mahiro agrees to his proposed emotional treatment: sharing a bath. To her shock, he becomes fully erect, and their overwhelming sexual chemistry soon has her straddling him for repeated bareback sex.