The mini flashbacks you get are the only things that remind you of the has-beens.

Both realized it far too late.

One gave up; the other still trying.

Both are pathetic and selfish. They like each other at the wrong time. They liked each other at the right time though both were too scared to act on it.

She's with him now. Taemin is laughing at how ironic it all gets when he sees them hand-in-hand.

"Taemin." Minho laughs at him. He doesn't like it. "Guess what?"

Deafening giggle. "What?"

"Sulli said yes!"

He's still running in a never-ending circle.