Is that guy their father undercover?

Probably. He looks stunned when he saw their blonde hair, whatever it is glad that abusive woman gonna die (╬￣皿￣)

I though he looked too young for that, but interesting theory

Same

It’s just my plain curiosity playing let’s see in the future chaps

Y'all are gonna be so shocked in the future

I think it may just be one if their siblings, a noble, or a palace employee

U read the novel? Do not tell me theres gonna be some plot twist ╥﹏╥

Nah, I read the webtoon raws. I mean there's a twist but not like a :
Σ( ￣□￣||) (￣ε(#￣)Σ Gasp, *cue dramatic kdrama violin music* sort of plot twist

Oooooo HELL YEAH THEN,i want some cute and wholesome scenes