The million-year conquest of the Demon Realm has five main stars and countless auxiliary stars, all revolving around a strange star that only shines and does not heat up.

1. Demon King Realm: Also known as Demon King, the Demon World space originally created by the Demon God, now that the resources have been exhausted, and the Demon God gave it to his heir, the Demon King Galesus.

2. Fire Demon Realm: Also known as the Fire Demon Star, it is ruled by the Fire Demon King, Valan Rocca Fire Demon.

3. Mad Demon Realm: Also known as the Mad Demon Star, it is ruled by the King of Mad Demons, Sara Kail Mad Demon.

4. Heart Demon Realm: Also known as the Heart Demon Star, it is ruled by the king of the Heart Demon, Garimes Heart Demon.

5. True Demon Realm: Demon God Star, the main star of the demon race inhabited by the demon god Nadal.