Wakana Gojo is a high school guy who’s totally into hina dolls and is training to become a master doll maker. Even though he loves making these dolls, his unique hobby makes it hard for him to fit in with his classmates. One day, his popular classmate, Kitagawa Marin, notices his talent and asks him to make a cosplay costume using his doll-making skills.

At first, Wakana’s unsure about it, but Marin’s excitement convinces him to give it a try. Marin might look like a flashy gal, but she’s actually a big otaku who loves cosplaying her favorite characters. Watching Marin enjoy herself so much, Wakana starts to come out of his shell bit by bit. As they work on the costumes together, they start getting closer and closer…?!