The father-in-law, who had been vigorously handling both work and play until recently, has aged significantly due to an injury. The young wife, Tsubasa, is worried about her father-in-law's condition. One day, he tells her that he had lost his vigor due to erectile dysfunction but felt desire again for the first time in a long while upon seeing Tsubasa naked. Torn between wanting to contribute to her father-in-law and feelings of adultery towards her husband, Tsubasa struggles. The father-in-law's relentless sexual approach to improve his erection was beyond belief.
