beta
I might be crazy fro saying this but I think it's Ido's bro that was in the past treating Sejin like a shit and Ido was watching on the side (I mean, he witnessed and can't do anything). Why? First, maybe it's just me but when I saw Ido's bro, I thought it was the angry Ido. They're really alike, appearance wise. I can't really tell them apart until when I saw them together (when their family is entering) BUT ITS WAS SUBTLE DIFFERENCE. Second, Ido's been dropping clues that he knew the past but there's was no sign of him doing repentance actions. Like, when he said 'Ive been longing for this for a long time' (non verbatim) when they first met, it was as if there's no way he treated Sejin like shit. Like, he's waiting for this moment to treat Sejin better because he's always been mistreated. AND, if it was Ido who's the shitty guy in the past, HOW WOULD HE KNOW WHAT SEJIN LIKES AND WANTS? If he's mistreating Sejin, how can Sejin brought him to Han river? Thought him french? The bathroom style? The garden? The preferences? I mean, if Ido hated Sejin, why would he spent time listening to Sejin? And the flashbacks on Sejin dreams doesn't match up with Ido. In Sejin's he's being mistreated but in reality they're doing fluff things and Ido predicted things as if it was aligned with the past. If it was Ido, HOW CAN HE MISTREAT SEJIN WHILE BEING GOOD TO HIM?!.
Okay, it's time for me to touch some grass