I Really Never Thought About Being Reborn.

Looking for a Book I Forgot to Add to My Shelf, a Reborn Romance Story

The male lead is reborn and goes to college. He's a big shot in the investment world, and the female lead is a professor at his university. The story has reached the point where she's about to go abroad for two years of further study, and he's planning to go with her. His surname is Yun, or his name contains Yun.