This book is about Lin Yu and Mo Ning
Lin Yu, named Siyu, has the blood of demons and immortals in his body. The immortals spurn him and the demons despise him. The immortals regard him as a shame, and the world regards him as a disaster. In order to take revenge, he washed away the demon blood. He met Mo Ning when he was a child. No one liked him, only Mo Ning would be good to him. Even after cultivating the right path and ascending, he would still be with Mo Ning.
Mo Ning was actually a little demon who later became a demon king. During his cultivation, he met Lin Yu and he treated him as a younger brother. Sometimes he would tease him and protect him. When Lin Yu had not given up the demon blood, he would also teach him some simple demon skills. Even if he gave up the demon blood, he did not dislike him.
Intention: I don't know, I just wrote it for fun