"One moment she was laughing, and when I blinked she was crying. Crying and then altogether, gone. " - Kai

They always argued. They always fought. And they always loved.

"She was hurt. Even if she turned her back on you over and over, if you really loved her, you would've kept coming back for her. But you didn't. You replaced her." -Baekhyun to Kai

Kai took her for granted though, and one argument went just a little too far. Far enough to the point where they would never ever argue again.