Engrossed in the family business of traditional doll making, Wakana Gojou is a reserved high school freshman without friends. Harboring painful memories of a childhood friend's disdain toward his interest, Gojou cannot relate to his classmates and their pastimes, eventually isolating himself.

Gojou has yet to perfect his crafting of dolls' faces, but is exceptionally skilled at making their clothes. His finesse with the sewing machine is soon discovered by his beautiful classmate Marin Kitagawa, whose boldness and honesty Gojou both admires and envies. Instantly, she shares with Gojou her own hobby: she likes to cosplay as characters from erotic video games.

However, Kitagawa cannot sew her own costumes, leading her to seek Gojou's expertise. Now, as he is dragged along to the charming girl's endless cosplay-related affairs, Kitagawa becomes his first friend who fully accepts him. Thus, although polar opposites, their relationship slowly blossoms through their aptitude in helping each other in the intricate world of cosplay.