While waiting for IR to turn up at the Police Station, HT plays the video IR had recorded earlier when she said her farewell to HS. He tears up when he realizes how much IR intrinsically knows what goes inside HS’ mind when the rest are clueless.
IR arrives and almost switches to Rocky Balboa mode when she sees the culprit sitting at the officer’s desk.
He was envious of us. He was envious so he felt jealousy. He was envious of how we never changed. So he wanted to show us that nothing lasts forever. Our happy time was just longer than most. And love doesn’t exist.
Apparently MK’s dad links his son’s phone to the Cloud so he could keep tabs on MK’s activities. That was how he stumbled on the photos MK took of IR and KJ. And then the evil idea came to mind, messing with HT’s mind about those coincidentally-taken photos.