The story of a perverted man who gets excited when he sees his woman having sex with another man. Riko is also reluctant at first, but because she is the man she loves, she gets excited when she is held and watched by another man. But [the man being held] doesn't know the reality. Her act gradually increases in intensity, and Riko is also drowned in a perverted world. Seeing Riko like that, the man couldn't control her excitement.
