Episode 26? : Also known as This Is Our Ouran Festival, Kore ga Oretachi no Ouran-sai or simply- the last episode of Ouran High School Host Club. Basically, Tamaki's leaving Ouran to get hitched with Eclaire Tonnerre who said he'd let him see his mother if he married her. Now, if he actually did that then Ouran would probably lose all it's fans. Thus, the dramatic car-horse carriage case, jumping off a bridge and at the end, and everything goes back to normal (as normal as can be I guess). Except, Kyouya and Tamaki's dads are competing with each other to get their sons to marry Haruhi.
Like that'll ever happen.
Ouran? : Ouran High School Host Club is a less than typical shoujo anime, evolving around a cross-dressing girl, henceforth Haruhi, in her 1st year of high school. Being "super-poor" in a super-rich school full of prestigious and affluent families, she has to work hard to maintain her top-of-grade scores in order to remain at Ouran to fulfill her dream of becoming a lawyer.
Just look at this page to find out more. It's part of my heavily under construction shrine to Tamaki. ^^;
Why? : This episode wasn't my favourite to be honest (that title goes to Episode 10), but close enough. :D