Angels are also demons, only in the heart.
'He' - Ou Yueye, has a devil-angel face and a kind heart. Leading them who are not sure whether they are angels or demons.
'He' always has an unknown secret in his heart.
He, Jin Yangxu, and Ou Yueye have been close partners since childhood. Ever since Ou Yueye came back, he has been by his side, accompanying him, and has always had unknown emotions for him.