Several years have passed since her husband's death. Hikari lives alone in their spacious home. Her daughter and son-in-law come to visit after a long time. Seeing her daughter and son-in-law getting along well, Hikari feels happy. However, an event occurs that changes everything. While having tea with her daughter and son-in-law and enjoying the conversation, Hikari's eyes fall on her son-in-law's bulging crotch as she picks up a fallen snack. The bulge is far larger than her late husband's, shocking and confusing Hikari. She picks up the snack and resumes talking to her daughter, but her mind is filled with thoughts of her son-in-law's crotch. Still in her forties and at the peak of her womanhood, Hikari hasn't had sex since her husband's death, and the unexpected sight of the bulge stirs her desires. Unable to stop thinking about it, Hikari finds herself checking her son-in-law's crotch whenever she can, letting her imagination run wild. She feels self-loathing for having such dirty thoughts but can't help wanting to see the real thing every time she looks at his crotch. One day, when her daughter is out, Hikari sees that her son-in-law is taking a nap...
