Riho's husband unfortunately died in a car accident, relatives came to condole with her. Suddenly, her father-in-law appeared, who had left since her husband was very young. Her father-in-law was a kind, trustworthy person in front of everyone, but when it was only her, he became a rude person, willing to push her to do it right in front of her husband's post. Because she loves her husband so much, she always resists, but gradually her father-in-law's skills make her distant and sink into carnal pleasures, accepting to become a toy for him and others...