Sousei no Tenken Tsukai Raw

In an era of warfare, Sekiei was saved from the brink of death by Hakurei, the young lady of the Zhang family who protects the northern border of the empire, when he was just a child.Since then, he has lived with the Zhang family as if they were siblings, but there is something he cannot tell his savior. Sekiei was the undefeated hero reincarnated from 1000 years ago!