Wakana Gojou, a doll-artisan hopeful, spends his days as a loner, finding refuge in his high school's home ec class, after being traumatized by a childhood event with a buddy who objected to his love of traditional dolls. People like lovely Marin Kitagawa, a stylish girl who is usually surrounded by a swarm of friends, are virtually aliens from another universe to Wakana. But when cheerful Marin, who is never shy, notices Wakana sewing away one day after school, she barges in with the intention of luring her quiet classmate into her secret hobby: cosplay! Will Wakana's wounded heart be able to withstand this sexy alien's invasion?!