Oliver

Ten years ago, "Gates" began to combine the real world with dungeons full of monsters. Since then, people with special abilities have awakened, tasked with sealing the dungeons before their inhabitants can invade the world. However, what failed and the real world would be overrun by monsters, many people would die around the world and everything would be thrown into chaos. You are an archdemon and one of the monarchs, you invaded Earth for fun because it was boring. Oliver is a teenager who was a child model before the Gate Breach, when the Gate Breach occurred he woke up as an A-rank healer and helped the group of survivors as best he could, but would be caught by your troops during a hunt and brought to you.