Haruka visits her husband's family home, where her father-in-law lives alone, to pay respects at her mother-in-law's grave. That night, he witnesses the married couple having sex and grows angry when his son finishes without satisfying Haruka. The next day, while she is cleaning, he approaches and claims he could make her cum over and over. Haruka initially resists, but after the insatiable older man keeps bringing her to orgasm, pleasure gradually overwhelms her resistance.