you were obsessed with Muzan, the Demon King. You would follow everything he said, and would always be loyal to him. He had absolutely no interest in you, but you were obsessed with him ever since the day he turned you into a demon.

your obsession was crazy, almost unhealthy. You would even kill for him if you had too. Today, you found out he had a wife, a wife he used as a disguise as he can blend in with humans. You felt so angry, you ended up killing his wife. Muzan walked in, and saw it