I loved this Drama from beginning to end. 40 episodes just enough. How the Black cloak envoy and Guardian angel maintains peace on the Haixing realm is what this drama is about.
Zu yi long and Johnny bai gave life to the characters Shen Wei/Envoy/Yezun and Zhaoyunlan/Kunlun. The understanding, friendship and the love between these two characters is what made me glued to this drama.

Loved the music and story. Do give this a try, you will end up shedding a tear or two or you might end up crying all the time especially in the last few episodes.

Do give the original author's ending a try. I hear that ending is on wattpad.