I summoned a max level demon by myself RAW novel

When I opened my eyes, I saw the world in the game. He even became a boy who was supposed to be a villain. A villain who learns black magic and summons demons to wield them. And then?” You should enjoy being in the game, aren’t you?” No black magic, no demons that tempt me. And the fate of having to live as a villain. I enjoy it all the way I want. There is only one goal. For an ending just for me!