Demon Slayer: I Am the Other Side of Muzan

People have their own spirits, one is good, two is evil, and the third is thought, which can be exhaled as a sacrifice with the help of external forces. In despair, I wanted to kill him. But I can't. Neither can I. I know all of you are wrong, but so what. What can I do. Last time I chose the opposite of you, this time I will protect you unconditionally. That person is "I" but not me. "What do you think of life?" Yuanyi asked the white-haired young man who was protecting Wuhan in front of him. The young man just tilted his head. "How could this happen?" "Shan Yan, what are you going to do!" "Am I a human soul? You are protecting me like this." "Both Nian and I can die, but you can't." The protagonist is pure black and will protect Wuxian from death, so don't worry. Ooc warning.