Izuku's mother decided to hire a pro hero to be his bodyguard. She chose Bakugo to be that person. Izuku didn't need a body guard, he know for a fact he could take care of himself but his mother insisted. Inko/Izuku's mother only cared about him because he's important to the company and love. She didn't need him for anything else. Izuku's mom has gone into a business trip for 6 months

Bakugo: you look like depress..