Become the Villain in a Time-Travel Novel

The male protagonist accidentally traveled through time and became the only son of the richest man in the Dragon Kingdom. He has a villain system and often goes against the protagonists of the world. It is written that he may cultivate immortality in the future and not accept too many harem beauties. Not the Holy Mother, as long as he becomes the enemy of the protagonist, he will not end well. The protagonist in the future has only one goal, which is eternal life, not immortality. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.