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 a dirty old man, she is unable to tell her boyfriend and drowns in the bad smell with his extremely unsanitary dick...