Hi everyone!

Okay, this story is about this seemingly normal highschool boy. Lately, there had been a phoenix (not sure, but it was a beautiful bird) following him around, claiming that he was the reincarnation of their leader. All reincarnations should have been within their country, however, the boy was an exception because he was born in Japan. Anyways, like the phoenix, other mythical figures is supposed to worship and guard the reincarnation, but another boy has been installed in their country as the "leader", so they are protecting that boy instead because they are under the impression that he is the reincarnation. The MC though has some weird powers that only the leader is supposed to have. Thanks <3

Sounds like Genjuu no Seiza.