Wakana Gojo is a high school student who dreams of becoming a kashirashi for hina dolls one day. Because his life is all about making hina dolls, he has a hard time fitting into his class because his interests are so different than anyone else’s. His classmate, Marin Kitagawa, is always at the center of attention and from another world. One day, they both end up on classroom cleaning duty and…

After seeing how passionate Marin is about the things she loves, Wakana decides to help her with making outfits. He decides to help her out in making a cosplay for Shizuku Kuroe-tan from the game "Slippery Girls 2." They had planned to reconvene later to get the measurements started, but Marin couldn't wait and ends up coming to Wakana's house over the weekend.

Marin and Wakana start to grow closer as he helps her create her cosplay. Though he's happy about the fact that Marin treats him the same way at school as anywhere else, he also starts to worry about the fact that other people think it's weird that they're hanging out. Despite that, Marin takes Wakana shopping so they can look for materials needed for her cosplay.

Wakana finally completes the Shizuku cosplay. Marin is super excited that she gets to dress as her beloved Shizuku-tan and suggests that the two of them go to a cosplay event the next day. Even though it's her first time at a cosplay event, Marin gets requests for photos left and right. Wakana is overwhelmed with feelings as he watches over Marin, but...

Wakana helps Marin make a bunny girl outfit so she can cosplay as one of her favorite characters.

Marin and Wakana go to a cosplay event and meet another cosplayer named Amane Himeno.

Amane tells Marin and Wakana about his past and how he got into cosplay.