My suggestions that I can think of off the top of my head:
Maid Sama! Manga | Anime-Planet
I think this one is very popular, and it's surprising that it doesn't have a synopsis yet..might be easier to just copy and paste the synopsis of the anime to this (considering the anime of it is very popular also)
Dengeki Daisy Manga | Anime-Planet
Is very popular on Anime Planet right now, coming in at rank #51
EDIT: Also: http://www.anime-planet.com/manga/faster-than-a-kiss
I'm reading it now and I absolutely love it, please please please do this one!
Keep up the good work!