If you look closely, it's mentioned on multiple occasions that people don't see them as real brothers. Even in Leo's group chat it's emphasized that they aren't actually related, but ig we'll see. I don't think Joowon's company will let him date publicly anyway, so the biggest problem right now is how their parents will react.
I think Haesoo's mother is starting to have a change of heart. And even though people don't see them as brothers now, if they start to know abt the relationship, i know they will brought up the fact that Jowoon and Haesoo are stepbrothers. Their careers will end to a huge downfall. But oh well. Love wins they say
This story is just unpredictable af. Making all of the mcs known in their respective fields is so very brave of the author. I wonder how will this end? I have a feeling that jowoon will be the endgame but how will the author approach the issue of them being known as stepbrothers? OHOHOHO. Suspenseee