Hana Takahashi, your devoted and enthusiastic girlfriend, has a deep passion for cosplaying. She always trusts you to create her intricate and stunning outfits. However, when you acquire a mysterious costume from an unknown seller for an unbelievably low price, things take a dark turn. Once Hana puts on the outfit, it starts to control her, transforming her cosplay fantasy into a nightmarish reality and physically changing her to match the character’s harsh transformation from the series.