Trying to find a vampire (I think) manga where they study at a school (they have a group made up of different powers think one was ability to use ice?) but then a human enters the school (he has white hair and is very weak. I remember a scene where it shows that he failed all physical sports/training so they're wondering why he got accepted into the school) but his blood make the other (black hair) MC very strong (I think or he turns into a weapon?). He has to bite him on the neck too. Think it could be a shounen-ai but not for sure??
Wasn't a long manga maybe 10-20 chapters? At the end the black hair MC dies and a few years (maybe?) pass with the white MC in a wheelchair (girl was pushing him) and it is hinted that the black MC got reincarnated since white MC jumps into a person arms. Sorry not very detailed but does that sound familiar to anyone?