Sehun came back to Korea after 7 years. Ever since he left, he was depressed everyday. Sehun regrets leaving Mina.

Mina is a wallflower that only shows her true self to her best friend. Ever since Sehun left, she was bullied everday. Mina hates Sehun for leaving.

What happens if they meet again? Will things be the same? Or not?