A visiting sales agent arrives at an apartment in a public housing complex. His customer is Aian, a married woman dressed in a leotard. She tells him her body feels stiff from too much yoga, so he demonstrates an electric massager he's selling. As she tries the sample unit, Aian begins pressing it against her chest and groin, forcefully releasing her tension. Soon, she wraps her legs around the man's neck, climaxing right before his eyes. She leaves to change her soaked leotard, but returns wearing another one, drawing close to him once more. Aian starts asking about the man's personal life, becoming increasingly intimate. "Lately, no sex either?... Same as me..." Surprised by her words, the man spills his tea. Aian carefully wipes his crotch, then forcefully undresses him, offering to play the shakuhachi flute as an apology. With skillful gestures and seductive words, she gradually draws him in—thus begins the dazzling sperm-sucking diary of a public housing housewife.