Rebirth 2001: I Really Didn't Want to Make the Whole Era Popular

Yunchuan, who is in his forties, is reborn and returns to the humiliating summer of his senior year of high school in 2001. Living under someone else's roof, facing the insults of his mean aunt and the disdain of his arrogant cousin, he had lived worse than a dog in his previous life. In this life, he doesn't want to endure it for a second! Living under someone else's roof? Sorry, I chose dimensionality reduction to combat this era!