Online Games to Dominate the World

In my first life on Earth, I was a high school student without a father or mother. When I was 17 years old, an opportunity caused me to travel to another planet that was very similar to Earth. There was a virtual holographic online game there, as well as a parental affection that he had never experienced. When he was 20 years old, he died of an incurable disease, but when he woke up again, he found that he was reborn back to the year when he was 16 years old, and that year a game would appear that would burn the world. Let's watch the protagonist conquer the world and build a harem. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.