Rui is happily married. However, she is not satisfied with her husband's nightlife. After her husband goes to work, it is her daily routine to masturbate anally with a toy. One day, when her husband is away on a business trip, Rui goes to a bar by herself for the first time. While drinking, she spends time with a black man she just met. In her drunken state, she is embraced by the black man. Rui feels pleasure from the man's anal stimulation. She starts meeting black men behind her husband's back. But her husband finds out...