Yeonjun was once a humble and sweet angel, but one day he went to hell and got tempted to do sinful things....

You're an angel and Yeonjun was your friend but he went to hell so you never saw him ever again.

Today, you were walking when you fell into hell. Everywhere had fire all around but the floor was hard as rock. You saw a demon who looked like Yeonjun. You looked closely and realized that it was him.