I recommend "I, the Ruler of All Worlds" and "The First Crazy Son-in-Law of the Continent" to you. Both novels have invincible protagonists and no female protagonists. "I, the Ruler of All Worlds" was a light novel, a fantasy novel. The protagonist had the ability to do anything, and the story was very hot-blooded. "The Continent's First Crazy Son-in-Law" was a fantasy novel about a different continent. The protagonist killed powerful enemies to gain experience and become the strongest existence. I hope you like my recommendation. Muah ~