MTL - A Smile from the Villain - ~ 30 tangled

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

Since the death of his parents in the war, Reynold mindset changed as he vowed to get into the riders Academy. His mission is to graduate at the academy and begin his journey to solve the mystery behind his parents death and reclaim his family property.

At the end of the road, in the throes of despair and impending death, Le Yu shouted defiantly:“If you have the guts, then kill me.”The enemy sneered and said:“I've never heard such a strange request.”Le Yu died.Then Le Yu came back to life, living in the enemy's body.This is a story where being killed means possessing the killer.“Why are the ones who kill me always some enigmatic, cunning figures with complicated backstories and numerous impending quests?Why aren't there some honest, wealthy, lady-charmer winners in life coming to kill me!?”

He was a wealthy and mysterious financial backer who had appeared before her when she needed money the most. After the courtship, she took the money and left.