Gonna spoil you since this bit of lore doesn't affect the plot outside of Jiho himself.
Jiho did betray Nadia in his first life.
But he probs didn't think Nadia's family wouldn't go through with it.
The whole story from start to latest chap proves otherwise.
At how genuinely sh#tty people Nadia's family and their network were [including Jiho himself].
I unironically felt more pity for Nadia's sperm donor compared to Jiho
I don’t know what they are saying they just through in some rando part where he doesn’t believe her and then the sister lied on him. He never admits he conspired with her sister for shit. He just looks at her every time she screams at him. He seemed more upset he couldn’t save her than anything. His villain arc is really but they do a shit job of explaining what happen in the last life. Like he didn’t marry her sister..so what he get? Nothing.

I’m mid-reading this and need to know: Did Jiho betray Nadia like her sister said?? Nadia is so sure but I’m not convinced. I feel bad for him I feel like he’s been misunderstood…╮( ̄へ ̄)╭