It makes sense that the brother was so adamant about keeping them apart cause now yisak wi...

It makes sense that the brother was so adamant about keeping them apart cause now yisak will definitely be able to tell when they’re switched. I’m also curious what deal the brother has with the grandpa. I have a feeling that when yisak marries, the brother would be free from all the family bullshit and he just wants freedom or something. Also curious about the thing between hyeondo and yisak’s bond thing. Is it like a fated pair trope? Damn im invested