Upon meeting up with Amane-san and his friends at a cosplay event, Marin and Wakana learn about a group cosplay shoot they're putting together for Coffin, a horror game. Unfortunately, the older cosplayers have life commitments that get in the way of hitting the studio for their appointment! Cue Marin and her ever proactive mind! She rings up a certain someone to see if they'd be game for an impromptu cosplay collaboration, but it's going to be a hard sell! When more bodies are needed, will Wakana have to pitch in to make up the numbers?!

Volume 10 of the My Dress-Up Darling manga series by Shinichi Fukuda.