The protagonist, Masataka Kagohara, and his wife, Miryo, are a close couple.

Masataka, who loves cosplay, wants to have sex with Miro in various outfits, but is unable to bring himself to do so. Then, he proposes to have cosplay sex with her using a suggestion device he received from a colleague at work. Although she is skeptical, she offers to help her beloved husband to overcome his dislike of sex.