Miu, who attends a certain school, is a student with excellent grades and good behavior; she is pure, pretty, and serious. She keeps her distance from her classmates and is unable to be proactive due to her lack of confidence.
Her only salvation in the real world is her childhood friend Ryuji.
The two of them are in unrequited love.
But Miu also has a secret. At home, she is a popular cosplayer named "Nikuoden" who posts pictures of herself in risqué costumes on social media.
Ryuji, who does not know about Miu's secret account, gets excited by the photos she posts, along with his bad friend Matsuda.
One day, Matsuda is the first to realize that "Miu = Nikuoden." The hand of a nasty devil creeps up on them. Will the two end up together?
Or...?