[Narcissist romance, each one tops and bottoms the other]
Xuan Shuang, the foremost immortal in the celestial realm, is compassionate and saves all living beings. His only flaw is being excessively narcissistic.
Countless fairies have secret crushes on him, each hoping to cultivate together with him. But the moment the immortal glances at one, he turns away, thinking, They don't even look as good as I do. Why would I cultivate with them? What would I get out of it? A higher cultivation level than mine, or a more powerful magical artifact?
Then one day, the immortal comes across a Soul-Severing Mirror.
They say an ancient divine artifact lies within the mirror. It separates the shameful side of an immortal and turns it into a demon.
Xuan Shuang is curious to see what his shameful side might look like.
He takes a look.
A few days later, a demon who looks exactly like him is born. He's spoiled, arrogant, cold, and selfish, nothing like the immortal in every way except for his narcissism.
Xuan Shuang finds it rather amusing. Though the other is a demon, he looks just like him, so perhaps he could raise him properly and use him as a stand-in.
Before he can indulge his compassion, the demon hooks a finger under his chin.
With that familiar face, the other makes a wicked, arrogant expression and looks down at him.