In their past life the dragon was born in the river and in the same time line as the uke so his age would have started then. In the current world he is like over 3,000 years old. That time line he was a child growing up with the uke. And I know they not actually father son but that’s just what the situation looked like because uke raised seme most his life so that made him his “ guardian” essentially. Uke said the same thing in one of the chapters. Like the situation is kinda weird to me but then now is cute in ukes current life I just thought how it all started was a bit strange. But I’m just assuming things that make sense to me so don’t take my opinion to heart.
Ok this is cute and all but I found it really weird how they started liking each other in their past life. The Uke was like a father figure/ parent to seme in their past life and then they just start dating cuz they fucked cuz the kid didn’t know shit/wasn’t educated. Just weird and gross cuz he literally raised him from a child to like a teenager/pre adult as a parent/guardian. They are cute currently in this current life but past life is just fucked up.