Guest Hero, Part-Time Devil, Main Occupation Black Dragon

In the 1st year of the Black Dragon Era, you broke out of your shell and were born to become the only unique pure-blooded black dragon in Lanya continent! In the 100th year of the Black Dragon Era, you have continued to experience and become stronger, surviving your weakest childhood without any danger. In the 300th year of the Black Dragon Era, you became an adult dragon and had the ability to transform into a human form. You decided to go to the human world to see a different scenery. In the 800th year of the Black Dragon Era, the Demon King used a mythical magic circle to forcefully summon you. He was overjoyed when he found out that you were not a human, and said that the evil dragon can be a guest hero, so why can't it also be the Demon King? In the year 1000 of the Black Dragon Era, you became the Demon King and became invincible in the world. Demon kings in other areas followed your lead, but when you were tired and tired, you wanted to be yourself. In the year 3000 of the Black Dragon Era, the war between the gods was fought. You had no intention of competing but got involved... In the year 4123 of the Black Dragon Era, you were invincible and looked down on all the gods in the world who could defeat you... For this reason, you fell into a long sleep... The computer screen plays the cg animation checkout page.. As the first player to clear the epic masterpiece "Black Dragon", Levi felt very happy. Then a white light appeared on the screen, and someone else traveled through time... Black Dragon Era 4423...