A drama about a fair-skinned, Yuria Kine, who is a brother's wife! Yuria, a frustrated wife who masturbates during the day, is approached by a delivery man who is familiar with her for a long time and uses his smooth talk to massage and suck her big breasts, making her tremble as she climaxes. The whole incident is seen by her brother-in-law. The brother-in-law, who secretly admires Yuria's huge breasts, approaches her using the fact that he witnessed her affair as a pretext!