It's their karma, they both hurted (does this word even exist?) each other on their past lives way too much, it will take a while to clean their souls ig
Hmm now that you say it's their karma, that's make sense
Actually its natural and irl common for adopted siblings to NOT feel “family” love to each other. 2 unrelated adopted humans dont always NATURALLY feel like family or bond with people they aren’t related to just because someone tells them to and puts them in that sort of environment. It doesn't work that way at all. Even from a young age, doesn't matter if they are even raised together, doesn't mean they will like each other or NATURALLY get along. Connection’s and emotions play a big part here just like step family members dont always feel affection or love for step siblings or step children they aren't biologically related too. Whats weirder is in the first part of the story they were blood related through the father - real incest was in play there. Id rather have this than the real stuff we had in the beginning.
This manhwa is actually really great. Great art and great story. My only problem with this manhwa is Beom and Sooyeon's relationship. Like why they need to be siblings in every universe? Even if Beom was adopted, I don't think it's right for you to catch feelings for your adoptive brother especially when you are living together as brothers since you were children. Even if you know he's adopted, it's only natural for you to still see him as your sibling. Adoptive or not, he's still your brother. It's just so fucking weird y know