Yuri's husband has been posted overseas and she is starting to get bored living alone. Worried about this, her daughter and her husband move into the room next door... However, even though it helps to ease the loneliness of her daily life, the throbbing in her body is smoldering inside her, and she gradually becomes frustrated and accumulates. At that time, Yuri is fascinated by her son-in-law Yosuke's big, erect cock, and unable to suppress her inner desire, she tries every trick in the book to seduce him. From then on, whenever she finds an opportunity, she plays with his thick cock while her daughter is not looking, ejaculating continuously, and devouring the pleasure...