Yoko Tsukasa, a married woman who hasn't had sex with her husband in a long time, has her affair with a man she met on a matching app seen by a male college student living next door. Yoko, who was threatened with this as leverage, allows the male college student to have her body. Unable to resist in front of a young and hard big dick, Yoko falls into a swamp of pleasure. A cuckolding drama of sinking and falling.