Everything isn't what it seems. But when you enter another world everything changes.

A stereotypical silly Isekai

Fantasy

what is this world?

Fantasy

The praise and criticism of the world, the indifferent gaze of others, what do they have to do with me? I simply smile indifferently; With my true nature, I relish favors and resentments, with my genuine heart, I roam the world at will, my fate is in my hands, not in the heavens. A remarkable individual from our world crosses into a different realm, watch as they ascend to the pinnacle of this strange world and become a generation's evil monarch.

A normal teenager finds himself in another world but he ends up discovering that he's much more

Alien action