I don't think the brother is gonna be the second lead. The obsession in the past life can be more of an overprotective brother thing in the present. And otherwise, they're showing that the brother was ultimately a good king, and in the first season we saw that he was a good brother. Idk, i can't see it going sideways, i have faith in this author.
Maybe i gotta go back and reread to see what everyone is talking about... because i love the seme
Hear me out, actor guy and puppy potato guy... it's happening.
They got together too easily after all that build up