Is kind of the same in this life too. MC only has one blood-related sister.
In their past lives they weren’t related a think, and I also think they’re not related by blood in this life because of the physical difference between them
I’m pretty sure they were distant cousins in the past life. They have to be related to both have a claim to the throne.
And there’s been no indication that they are not fully blood related brothers in the present life. The mother has light colored hair.
Basically yes I think what you said is right.
So in their past life the king and mc were like cousins and in their current life he is his blood related brother like they share the same mother and father?? Am I wrong?