It's pretty obvious what the solution is when it comes to the whole doppelganger situation and if he should be destroyed or not. If they destroy him they're assh**** he has a spot to fill in his family has been looking for him ever since his dissapearance that night he got kidnapped obviously they didn't find a body if they're still looking so it's possible they believe he is still alive. Which he is. The whole point of a doppelganger is to take over someones life- seong ha or however you spell it doesn't even look like Lee woo-yeol so that wasn't gonna work out anyway?? So plan b return him back to his original life before he died cause obviously that seems like the better and easier choice- its gonna happen anyway.

This whole thing with his brother could've been avoided if his father wasn't such an ass**** and chose favorites. 😒