The Soul Reaper Of Renmant (rewrite)

Y/N Sakaki is a young but insanely powerful Shinigami born with hollow powers from a fight Y/N's mother was in she managed to beat but it instead possessed her passing it onto Y/N when he was born years later Y/N's parents were killed by his older brother only leaving him with his older sister a few years later Y/N joined the Gotei thirteen and was sent on a hollow extermination mission but what happens when he enters a portal and goes into another world called Renmant what happens when he meets a certain wizard and attends a certain academy only time will find out for our young hero.