No Seong Mo killed them all and started the fire. The only thing Geun Taek did was kill the body in the suitcase.
After watching again I realised what had caused my confusion! It was because the woman who opened the door called him ahjussi, so I thought it couldn't be seong mo since he was a teenager at the time! But it was because she couldn't see his face!
Yes this was a very basic comment. Thank you for your time xD
But I don't mind it! It's an interesting concept even tho it's overused these days
Thank you in advance
Moon Bin?
Why didn't I know about this?
But yeah Gung Min is the only thing that comes to mind hahahah
I'll watch it again to understand completely :)