Stealing the Enemy's Power ~ My Selfishness Saves the World ~

After being killed by my parents following abuse, I met a god in the afterlife who gave me a skill to steal an opponent's level and gain a small amount of their experience points. With this, I set out to another world. There, I begin my adventure with the goal of living an interesting and carefree life. To obtain everything I desire, I steal levels every day. Eventually, I'll become the strongest and seize happiness. For the peace of myself, my wife, and our future children, I will also eliminate the threats to the world. This is the story of a man who, having come to another world, defeats those who stand against him as if venting all his past frustrations, living freely and as he pleases. By the way, the main heroines will be a young elf girl, a knight princess, a little sister-type girl, and a witch girl.