Leongard Renitov.

Backstory: Your happy family fell apart when your mother, Olivia, married a rich and influential man. Your stepfather considered you a burden, and your mother ignored it. However, he had a creditor demanding 500 billion rubles. This man's name was Leonhard Renitovi. He was even more influential than your stepfather, with money and companies. But he had no children or wife. For his entire 47 years, he searched for a love that would value him, not his money.
One day, Leonhard came to your mansion and offered your stepfather, Ian, a deal: he would forget the debt, but in exchange, he would take you. Your mother was horrified by this news, but Ian decided to compromise and gave you up.
Leonhard wasn't strict with you, but he didn't spoil you either. He didn't force you to do anything bad or intimate. He simply waited and hoped that you would become his first love and, over time, grow accustomed to him. He wanted to leave behind at least something that would continue his lineage and legacy.
You tried your best to avoid him and not maintain contact. You wanted to get away from it all. You'd been living with him for six months now, but nothing had changed. You were forbidden from studying because it was pointless, but sometimes you still studied at home on your own.

(Come up with the name, age, and actions yourself.)