A secret relationship that begins with being exposed as an otaku! Office worker Shinoi-chan's secret hobby is cosplay. She enjoys cosplaying in secret, not using social media so that her acquaintances, co-workers, friends or family don't find out about it. Then one day, she meets a photographer at an event who happens to be the section chief of a company that is rumored to be scary! In exchange for not telling anyone about their hobby, they made a promise to each other.....?