Demon King's Diary

When I was 25 years old, a strange creature appeared on the earth. In order to investigate the origin of this creature, I went to the black hole, but I was attacked on the way. I fell into the black hole and traveled to an unknown world. I became the son of the devil, fell in love with the daughter of the fairy king, and fought against the traitors of the human race. With my continuous efforts, I finally became the three kings of the other world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.