After watching the Anime and finding myself wanting more, I read the Manga. Didn't realize before the end that the manga ended where the anime ended. Then I experienced it all over again by reading the light novel. Now that I'm finally beyond the end point of the Anime and Manga and THEN there's an update? Really? :P
Alright so the manga and anime ends at pretty much the same point. You'll be there in a sec basically. The light novel extends quite a bit beyond that. Each anime season is roughly 2 light novel volumes, which means volume 1 through 4 is covered already by the manga and anime. Don't quote me on this but I know there are at least 14 volumes out. And believe me they are a light read.
You two idiots should hold hands forever pleeeease. I love how it's kinda like the only power they have left and it's strangely poetic in a way. Argh I can't get enough.