I'll Take the Bosses from All over the World Back to Modern Times

Jiang Xiaolong took the tuition fees raised by his family and entered the university campus with great expectations. But he suffered humiliation in college and eventually died with regret. By accident, he traveled to a different world and started out as the humblest mortal. After endless years, walking through mountains of corpses and seas of blood, and surviving countless epochs of hardships, he counterattacked all the way to the top and became the Holy King in charge of the law of time. After he mastered the laws of time and space, the first thing he did was to make up for his four years of college life.