Haruka Yamamoto, a 60-year-old grandmother who has lost her beloved husband and lives alone with her kind grandchild. The manager of her grandson's company has her eyes on her, and Haruka accepts the manager's meat stick after being threatened by his grandson's restructuring... Haruka's favorite play, rope binding, is discovered by the manager who visits his home. When the body trained by the late husband is tied up, it becomes more horny and rich sex. Such a sloppy relationship is exposed to the grandchild, and a large amount of semen is injected into the incestuous intercourse with the beloved grandson.
