NOW I GET WHY THE LIGHTS IN THAT ROOM WHERE ALWAYS ON,the bluprints are actually written in the floor that's why they never turn off the light cuz just as taek joo did there is other people who could've saw the room a bit but there's nothing suspicious about it they might just think there's someone in it....,i fell like a fuc**** genius (it was obv) and also i think zhenya told all that bc he hoped that he could meet him again 🤭