The Beautiful Master Who Protects Me From Depression

Master Gao Ling (ling second tone), disciple Zhanchi, no fixed perspective, third person.
He was his master, who rescued him from suffering, but ignored him for thirteen years. Once he discovered the master's secret, he discovered that the master was the enemy he had been looking for for many years. It was the master who killed his parents, made him become a demon, and imprisoned him for three years.
He escaped and grew into the famous Soul Demon Emperor step by step. He claimed the master of the Demon Realm and conquered Kyushu. After decades of tit-for-tat, he severely injured him again and again. He captured him and tortured him for a whole month. He killed the people he valued in front of him, and he abolished his swordsmanship... As a result, he died in front of him and disappeared in his arms. Only at that moment did he realize that he hated the wrong person. His master had always been protecting him and suffered injuries...
Decades passed, and he could never let go of his inner demons and obsessions. Once he died, he murmured, "Master, I really want to see you again..." As a result, when he opened his eyes, he saw...
This is the first time I have written an emotional line, so I am slow and I don't know if I can portray it well. Please don't mind me.