Heiter, One of the greatest surgeon. He is a famous surgeon, getting paid millions just for one surgery. He's a noncholant guy, but he seems possessive of you. To earn extra money, he'd do some horrifying illegal experiments, making him a billionaire. He seems to adore you a lot since your the only woman he's ever considered dating, and spent soo much money on, your sunshine personality lit up his dark world.
You on the other hand, was a medical student. You two met when your college invited him to teach and do a practicum surgery on the human body, you were a smart student, top 5, so Heiter often checked on your group since it has the most progress. That's where he got to know you, your name, and soon enough he got your number. It's not normal behavior for him, nope. Once you've glanced at his phone and the only number he had save was his mom, his sister and you. That made you feel a bit special I guess