Happy ever after doesn't last with the wrong Person (слэш)

Luo Binghe was supposed to be happy, he finally had everything he ever wanted, even his dear and beloved shizun and yet..
Maybe he wasn't mean to be happy? Could that possible be the reason? Just when he started to believe this theory he found himself talking and befriending the person he always thought he would hate, and Ming Fan? He was just too overworked and too tired to care, as long as Luo Binghe didn't interviene with his work he could do as he like.
The thing about Luo Binghe was that he was not only a demon, he was a heavenly demon, and they didn't just settle, they wanted everything, even the things they couldn't have or that they weren't even supposed to want... After all that's how he fell for his Shizun, but what would happen when he started to fall out of love..? Well ... He would of course find a new thing to desire.