The Top Demon Pretends to Be a Rookie and Is Treated as an Experience Pack by the Protagonist Group

A demon cultivator accidentally became the Demon Lord. He didn't expect that the days of being too invincible would get tired of him so quickly. The Demon Lord had to fall into a deep sleep and wait for the immortal cultivator to fight back. Unexpectedly... When he woke up, it was even worse. The Xianxia sects had all turned into magic schools. Only then did the Demon Lord find out. He was summoned to a different world, which was interesting, but he still wanted to die. The Demon Lord had no choice but to set his sights on the world's number one magic academy, pretending to be a fragile and innocent crane tail. By the way, he pretended to be the unique Demon King in this world and taught the destiny protagonist how to kill himself. In this magical world where fairy tales and legends exist, the protagonist Zeyue happens to be reborn and returns with some kind of secret. He is full of hatred and vows to torture all the people who betrayed and harmed him. But who can tell him why there is an extra person inexplicably in the reborn world who will occupy his future position as the Demon King.