I don’t think “incest” is a problem but the fact that they’re step siblings by law and it is recorded that they are step siblings so I find it confusing how they would even get married if they’re step siblings to everyone around them and on paper? U feel me? I just find it hella awkward and would’ve preferred it if they weren’t step siblings in the first place so that the whole “oh ur going to marry ur step sibling but how is that possible? Would she or he need to be disowned by the family name or???”
I feel you , i would not be really confortable with the idea of marrying my step bro either but this is not our time , considering the context ,time and place of this webtoon, getting toghever among the fam is common ,we can't really judge with our outer perspective, things have change,we're the future they're the past,they do not think like us.
and like the authors note say nothing is forcing you to read something with a theme that you are unconfortable with,i'm not trying to say you're wrong in any way but if that's so unconfortable, stop reading and read stories that suit your taste.
They are step sibs by law but the ml already said that he doesn't think of her as her family which means 2 things. 1 is that he doesn't like to think of her as a FAMILY cause he has crush on her or 2 is that literally he doesn't think of her as family and thinks of her as a stranger which I guess is pretty impossible cause he is the ml. Anywho onto the next thing; they are the ppl of the past which means they oldy and the oldy ppl think different than us as u know and the law was also different. The law wouldnt even mind if they're step sibs and got married or sum. And I agree with the one who has a orange colored pfp. If you don't like this kind of incest shi pls don't read it and say its incest.. We know DAT (this sentence is not meant to be rude or offensive) I hope you understand what I meant. See ya

Before commenting that's incest read the translaters note at the start of chapter 4.
I ask you to please respect their wishes since they do all the work and that seeing repetitivly if "thats not right its incest" is kinda casse couille (since i'm french i could not find not better words).