There are bits of romance here and there, but it's pretty basic and more used as a part of explaining character and motivations than a primary feature, I'd say more than Bleach or Naruto if that comparison helps, but not by all that much. Which makes sense given that it's basically a growing bunch of young teenagers traveling from one highly dangerous situation to the next. Not sure if it's "too shounen-y" or "just shounen-y enough" since that varies for the reader, the battles are generally far less drawn out than the previous titles I mentioned for example. For me it's a welcome change of pace from one of the author's previous works: "Claymore", which, while good, was often rather depressingly "seinen-y."