Yumi, frustrated with her freeloading brother-in-law Keiji who never works and stays cooped up at home. She tells her husband she wants something done about it, but he's useless and only indulges him instead. Just then, Yumi comes down with a cold and takes to her bed. Keiji, who has always found his nagging sister-in-law annoying, seizes this opportunity to push her down… Her weak body unable to resist, Yumi's voluptuous form is trampled upon. But that's not enough to satisfy the vengeful, clingy Keiji…
