Well.. For me.. Kang Sejun was kinda SUSSS!!

At first I was overthinking things that the perv who likes to hit on and touch ladies & Yoojin are accomplices.. But nah, thats too obvious.. Then I started being sus with Sejun when he always calls Jang Mirim and waits for her outside the company building.. Actually I probably started being paranoid about Sejun when Mirim's Car Keychain went missing.. He was pretty sus and being very creepy... They might be dating, but ya'll need some space for privacy man.. Then I started to think its either Yoojin or Sejun, or maybe even both.. Both its all clear to me now.. No offense, I do think its pretty dumb to check someones belongings inside their teritory.. Like how Mirim check his bag inside his car.. I mean she would really get caught easily.. Look at him staring creepily from outside the car window.. I also think that Sejun also went back in time, because like Da-ae said.. She met all her Mirim/sister's friends in college.. She never met a KANG SEJUN or ANYBODY who looks like him.. Oh man I got the chill in the last panel in Chapter 57.. Like fck, thats creepy..