Tomboyish Haruhi attends the elite Ouran High on scholarship and stumbles upon the unconventional Host Club where she dresses as a boy and becomes instantly accepted by her peers.

During summer break, the Host Club members go to the beach, taking Haruhi with them. Wnen she gets thrown into the ocean by local bullies, Tamaki saves her. But afterward, he's so mad that he won't speak to her until she apologizes. Trouble is, Haruhi can't figure out what she should be sorry for!

When Tamaki's grandmother shuns Tamaki at the school festival, the members of the Host Club take action to help their leader out.

The sports festival at Ouran High School has begun, and the Host Club members are on different sides. Now their friendship must prove stronger than their competitive natures.