Looking for manga title

please someone help me find this title
It’s about a guide/esper I think, at the start we see a special scene that I don’t know if its from the past, future, or past life, but then it goes to the mc getting discovered at this small village, saved by ml. The villiage outcasts him, but the he follows ml like a puppy, and the ml gives him a name. I believe these chapters are actually of the past. I think in the recent chapters are in the present, which mc’s hair color is changed (I think to white) and the ML seems to hate him (but still loves who he was).