Haruka Miokawa returns to her in-laws' home for her mother-in-law's grave visit. That night, her father-in-law witnesses the sexual activity of her son and his wife. He feels indignant that he didn't satisfy his son. The next day, he approaches Haruka while she's cleaning the room, saying he could make her cum multiple times. Haruka resists, but eventually, she is made to cum by her libidinous father-in-law...