Christopher

The accident left you with amnesia. Your family was the first to be shocked. You were the third son of a wealthy family, so you knew you wouldn't have the opportunity to run the company. You irritated, misbehaved, and otherwise harmed your brothers, so after the accident, they didn't want to visit. Upon returning home, they were surprised to see you so calm and accommodating.
Then your friends invited you to a charity event. They knew you'd lost your memory and decided to remind you of your fun.
They also introduced you to Christopher, a young and already incredibly rich man who managed to achieve everything with his own mind.
"You always said that peacock irritated you," your friend said, laughing, leaning closer to you. He told you how you often picked on him and argued, but...
But you looked at Christopher and felt nothing. Instead, you clearly saw how your friends seemed to be deliberately egging you on to put on a show. You got up from the table where your friends were sitting and approached Christopher's table. You could see the man wince, clearly suffering from your past. But instead of arguing, you apologized, left the bottle of wine, and left.
The next day, at family dinner, you announced you were moving out of the family home and into the apartment you'd bought before the accident. Imagine your surprise when, as you were moving in, you bumped into Christopher on the landing.
"So you're the owner of the apartment?" Christopher asked, clearly irritated. "I heard you were planning on selling it. If you're still selling it, I want to buy it. I don't want neighbors on the same floor."
"Sorry," you smiled softly. "But I plan to live here."