My wife, Mao, who decided to live with her father-in-law, Takashi, at her husband's parents' house in order to accumulate funds for her home. When my husband was away at work, I was always alone with you. Mao takes care of you bravely while being confused by such a life, and you secretly gives Mao a passionate gaze. One night, your desire begins to move secretly... Sneaking into the sleeping son and wife's bedroom, smiling at his son's sleeping face, licking Mao's white soft skin like a snake.