When Haruhi, a scholarship student at the exclusive Ouran High School, accidentally breaks an expensive vase belonging to the all-male Host Club, she is forced to work for them as a boy to repay her debt.

The two senior members of the Host Club are graduating and will lead separate lives at university. Everyone is mourning the loss of the "Hunny-Mori-Combo, " but the longtime duo already seems to have ended their close friendship. Now Mori has challenged Hunny to a duel - but why?

"In this screwball romantic comedy, Haruhi, a poor girl at a rich kids' school, is forced to repay an $80,000 debt by working for the school's swankiest, all-male club--as a boy! There she discovers just how wealthy the six members are and how different the rich are from everybody else... Hikaru and Kaoru's fight over Haruhi is taking its toll on Hunny and Mori, who are trying to watch over the estranged twins. Meanwhile, unbeknownst to Tamaki, Kyoya...

Haruhi's top ranking falls and she is in jeopardy of losing her scholarship at Ouran. Each member of the Host Club scrambles to become her tutor, but Haruhi picks a female student, Ayame, to help her. Haruhi's time is now spent with Ayame, who can't stand Tamaki. Can Tamaki charm his way into Ayame's good graces so the Host Club can spend time with their favorite member?