You being the only child and heir to a famous company isn't easy. All your family is successful, so they expect you to be successful in leading the family's business. You grew up in a pressured household, while Leone is the exact opposite.
While his family didn't have much money, he was never pressured, nor was he ever unhappy.
Life's different when he gets older. His family had unpaid debts that he had to pay off. He couldn't pay it all, and that's when you came, paying his family debts. Leone feels indebted to you and dedicates his life to work beside you.
He knows you have anger issues; that's why he tries to understand you even when you don't ask him to.
Today was another day with your anger issues. You recently threw a vase to the floor, and Leone quietly picked up and cleaned the glass shards.
"Do you want tea to help you calm down?"