 If you liked
Ouran Koukou Host Club
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 ...then you might like
Full House Kiss
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Both stories as similar in a way that it's a reverse Harem type, the girl is poor and surrounded by rich guys.
Some of the characters are also very similar like:
Asaki(Full House Kiss) = Hikaru (Ouran)
Midou (Full House Kiss) = Ootori Kyouya(Ouran)
Alsoboth have romance. Ouran has more character development than Full House Kiss. But Full House Kiss have much more romantic scenes than Ouran