Based on an otome game from Otomate. <br /><br />“Airi” had been living her normal, peaceful life in the White World. “Luna” had been ruling the Black World as the Queen. One day, a coup d’etat rose in the Black World and the two girls were swapped-- Airi to the Black World, and Luna to the White World<br /><br />What is the secret that lies behind these worlds and what underlying connection binds Airi and Luna--?