Asian-language import features cute and stereotypically coy Naomi Hirose getting fucked after three different costume changes. Hence, the term "Coslady" in the title. (She's a "costume lady.")

First costume is a masseuse, next is a bikini and the final one is an Asian schoolgirl outfit that looks like a cross between Catholic schoolgirl and sailor. The costumes, though, have little more than an incidental bearing on the sex since the four scenes are just basic one-on-one romps on a mattress on the floor.