Shinkirou

A sleepy little town in a remote corner of Japan is actually the front for a secret society devoted to the protection of a Sacred Tree capable of granting wishes to special people.
The male protagonist, Yuuya Furusaka, is a member of this group but, although blessed by the Tree with a healing power, the side effect of this gift only worsened the suffering that plagued most of his life.
But maybe even Yuuya can hope for lifelong solace and love by sharing his hidden torment with another distressed soul, if his own power doesn't destroy him first....