At Ouran High School, the Host Club, filled with charming boys, captivates the female students with their glamorous entertainment. When the club's suave member, Kyouya, undergoes a surprising transformation, jealousy sparks between Tamaki and Haruhi as she forms a connection with the school's director. Amidst the ensuing turmoil, an unexpected event plunges all the club members into an underground realm.