The Ouran High School Fair provides the catalyst for a pair of disapproving fathers to tip back into their sons' lives, with public humiliation for one and an arranged marriage for the other.
Hikaru and Tamaki's insecurities show when Haruhi runs into a male friend from middle school days, but while Tamaki recovers, Hikaru does not, so Kaoru steps in for his twin's sake.
On the last day of summer vacation, Tamaki decides the elite members of Host Club should go on a field trip to observe commoners in their natural setting - a shopping mall.
The heir to a crime syndicate comes to Host Club to be Mori's apprentice, hoping for a share in his secret of having friends while owning a scary face.