hi looking for a omegaverse? i believe, it starts off as a prince(?) of a country is runni...

hi looking for a omegaverse? i believe, it starts off as a prince(?) of a country is running from some ppl and finds refuge in this area around a temple or cathedral like tomb thing built by the first king of his country or whatnot, and there was this dude who was his like enemy or something that helped him so when the prince went back in time, he decided to help his enemy and thats all I remeber, it was a BL ibelive thanks:D