Kayoko Kuroda is a first-year high school student who just wants to help people behind the scenes. But as she tries to live her mundane life as a “kuroko,”a stagehand who shines backstage, she has an unexpected close encounter with Rento Shishima, rumored to be the most dangerous boy in school! Just when she thought he was helping her with her backstage work, he declares he’s gonna make her the main character! Kayoko sees nothing but chaos in store for her school life with the unpredictable Shishima-kun!!