Wipe me off... and then take it in your mouth. An old man lives with his wife's stepdaughter, Nana. His wife left Nana behind, running away from caring for him after he became bedridden due to illness... The man thrusts his unstoppable cock into the unfortunate Nana, who takes over as his caregiver, and penetrates her deep throat while she nurses his disabled body. But Nana doesn't refuse... She obediently accepts and continues to take it in her mouth. It should have been painful and difficult, but for some reason it filled Kokoro. Having been abandoned by her mother and feeling like her existence was denied, Nana may have found meaning in her existence by becoming codependent on the man...