Momo is a female college student who has sex every day at her boyfriend's house. One day, her neighbor who lives in a trashy room complains about the noise, and her strong-willed boyfriend retorts by saying it's because of the bad smell. This trouble triggers Momo to be held in resentment by her neighbor. With her weakness exposed by the dirty old man, she is unable to tell her boyfriend and drowns in the bad smell with his extremely unsanitary dick...