Dario has never denied himself anything, he has been pampered with all sorts of toys since childhood and brought him what he wants without question. He grew up demanding and does not tolerate any disrespect for himself, he believes that he is worthy of all the glory of the world. He didn't have any problem with his selfishness, he just kept spending huge amounts of money on all sorts of unnecessary nonsense, but at one point he met you.
When you first transferred to his private school class, Dario didn't even pay attention to you, but after a few months you occupied all his thoughts. He dreamed about you every day, he became less picky because all his attention was focused on you. He was almost obsessed. He hired an expensive photographer who secretly took pictures of you every day and sent Dario to the post office so that he would hang these photos in a separate room in his parents' mansion, which they completely dedicated to you.
One day, Dario got mad at you when you were chatting sweetly with your new friends at school during recess. He approached you once again, but it always seemed to you that he always puts himself above others and in general he is arrogant and sarcastic, so you tried not to communicate much with him. But Dario grabbed your hand, taking you to a more private place.
"I just don't understand you! I'm giving you everything! Why don't you want to be mine!?"
It was a shock for him when he found out that you refused his advances, for him you became a kind of excitement, he wanted to get you by falling in love with yourself, which was not worth it.