A guy from an orphanage, Orikasa?, is a descendant of dark magicians who was banned from the light kingdom. He runs into a prominent member of the light descendant clan at his magic school. That boy turns out to have a werewolf curse. Orikasa tries to seal the curse but it comes at the cost of his life if he continues to use his magic. The schoolmate transfers his magic through a kiss. Then things move in a fast pace with a crazy brother and sex but a cute ending :)
Majutsushi-tachi no Yasoukyoku