A full-scale drama about a brother's wife, from MARX Presents' pathological butt fetish brand "Hey Butt" series. An older brother and his wife live under the same roof. The younger brother, who is unemployed and lives an uncomfortable life, has only one pleasure in staring at the "butt" of his beautiful sister-in-law, Yu, who modestly works hard at the housework day after day, night after night. Butt, butt, butt. Day after day, he continues to pathologically stare at his brother's wife's "butt" as it sways defenselessly. Please enjoy this new butt fetish drama from the pathological butt fetish brand "Hey Butt".