Beats me. OHSHC is one of those unique animes but if you like school/slice of life animes here are some to choose from:
Special A (funny with romance)
Kaichou wa Maid sama (romance, like the OHSHC just with maids)
Lucky Star (funny, slice of life)
Toradora! (hilarious, filled with romance)
Lovely Complex (romance, comedy
Clannad (slice of life, romance)
You should try watching The Melancholy of Haruhi Suzumiya. and Lucky Star anime you will like it alot watch them both on youtube ok. Lucky Star is the girl Konata Izumi with blue hair and Haruhi Suzumiya is the girl with the brown hair. And this is just a season 1 comparison of bothe the animes ok.
"this ugly yet beautiful world"
"save me lollipop"
i have watched fruits basket and ouran highschool host club already and these are just as good i cant get enough of them "this ugly yet beautiful world" has only 12 episodes :( and "save me lollipop" has 13 sadly too short but inuyasha and sailormoon has over 100 each so addictive all of them they are that good. hope i helped
The closest I could find is Aikatsu. It's flipped, instead of all boys and one girl, it's all girls and one guy. They both take place in a school, and they both have characters that make me go WOW (e.g. Tamaki + Mizuki) Aikatsu is almost like a more kid friendly version of Ouran. All it needs is hosting. And they both have fabulous outfits. (Note: The guy is not pictured in the pic)
I STRONGLY recommend the anime series "Baka and Test" ( English Dub ). I just finished, it is only 26 episodes, it reminds me alot of ouran high, and fruits basket. It has romance/comedy/action/cute-violence/ and lots of other stuff :3 definetly try it :)