Based on the popular series 'The Father-in-Law ~ Yumi's Afternoon ~', starring Shou Nishino! The daughter-in-law, Yumi, has a heart and body as beautiful as the Virgin Mary. Her lascivious flesh stirs desire; her father-in-law, Nobezo, a lump of lust, has been waiting for an opportunity to make her his own. Just then, Yumi's younger brother, Naruki, visits... There, Nobezo accidentally gains leverage over her and uses it to manipulate her. Of course, this isn't something that will end in one go; he relentlessly humiliates her...
