After Eating an Oreo, I Became the Master of Demons?

Ye Xuan, a young man from Earth, ate a piece of Oreo and traveled to the Mirror Earth Planet. Mirror Earth is a planet that is highly similar to the Earth, but it has a special phenomenon: the Demon Age! Every nine hundred years, a wave of demons will attack Mirror Earth Star. In the demon era that lasts for one hundred years, humans will fight against the demons and restore peace to the mirror planet. Among them, the leader of mankind is the Lord of Demons. The Demon Lord is confirmed through the Demon Order, and Ye Xuan is the new generation of Demon Lord. With the help of two assistants, he will gradually restore the abilities of the Lord of Demons and help Mirror Earth Star return to the era of peace. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.