Yui lives with her daughter, her husband, and her husband. Her family leads a peaceful life, but one day her only girlfriend's underwear is stolen! "Who would wear such an old lady's underwear...?" The son-in-law, who has been fascinated by Yui's big tits for a long time, explodes her desire and finally attacks Yui! Yui, who was frustrated with her, couldn't refuse and was toyed with by her son-in-law like her toy.
