Wakana Gojo is obsessed with making Hina dolls. Unfortunately for Gojo, he feels he has to hide his passion since it isn't a very manly hobby and could incite bullying.  His sewing machine broke and as he was using the schools machine his crush Marin comes in and sees him! Fortunately, she is impressed with his abilities and asks to help her with a cosplay she is struggling to make. Gojo accepts and thus begins their cosplay adventure together.