To support his wife, who is about to give birth, his mother-in-law, Shiraishi Marina, comes to Tokyo. Just when the family bond seems to deepen, a prohibition on masturbation is announced! When he secretly takes action, he faces an unexpected situation. The suggestion to help becomes a turning point in the story. The mother-in-law of the leading actress, Maririn, charms with her eroticism and sweet voice. While we wish for a little more stimulating elements from Kazama Yumi and Shiraishi, Shiraishi's voluptuous figure and maturity are indeed captivating. The entire work vividly depicts the deepening relationship with the son-in-law, making it well worth watching. Shiraishi's acting skills enhance the work, ensuring that viewers will be drawn in.