Just a opinion but seeing how fast the stalker disappeared and the shiwoo's secretary or whaterver (I seriously don't remember him) appeared. I feel like he could be the stalker since shiwoo asked about it himself like how fast the stalker disappeared and how did he get the access to enter the filming facility. 
If you disagree idm, let me know
If you disagree idm, let me know
You may not know me ...
BUT I DO 🙃
BUT I DO 🙃
Spoiler!
You are reading sm** instead of studying 😈
