I'm now 50 chapters into Undead Unluck by Tozuka Yoshifumi and getting emotional whiplash, in a good way. The anime wasn't really grabbing me as much as I wanted it to (I was watching it for a friend who wanted someone to squee at) and I was having trouble paying attention to it. The manga, on the other hand, has got me by the throat. The somewhat-typical shonen action/comedy has had so many moments of profoundly painful tragedy and a remarkably sweet romance woven through it that I'm having trouble putting it down.