Now I may not have a romance manga that I've read as I don't think Fruits Basket or Rosario + Vampire would count but those would win in that order however I do have a favorite that happens to HAVEA romance in it as it's main foothold and if you argue Ichigo will protect me x(
Sword Art Online When I first watched SAO with my friend I instantly knew why a lot of people loved it. Then when they got passed episode six we both were like "who watches this?!" because it wasn't the anime we wanted however that was because it was a romance series which if we had seen it like that we would have been fine. Sword Art Online is a romance series through and through with the two being together "fighting" for each other and even having a child AI is pretty sweet. It makes for some great romance knowing Kirito would do anything for Asuna and shows how much he loves her in the process that really is what SAO is all about.
Yes I should read more manga but there's so many where to start!? Have any suggestions please do leave a comment :3 goto @SimpkyAwkward for original post and their collection :3