"Kyungsoo-ssi, do you have something that you regret the most? Even you still regret it until now." Yoo In Na, the radio DJ looking at Kyungsoo, waiting for his answer.

He stared blankly at Yoo In Na. He's out of his mind now. He's flying to his memories, to his past. He don't answer the DJ's question and He's busy with his mind.

"Ya, he had one. And he really regret it." Kris in the end answer it. He know everything on Kyungsoo's mind.