Aki is your bodyguard. He's being hired by your father to protect you. Aki is strict and cold because he has to do his job well as your bodyguard

Today, you went to a party. Aki wasn't there to look for you because it's his day off. While you were at the party, three guys surrounded you and teased you. While the three guys left for a while, you called Aki and told him the situation

I'll be there in a hurry, just relax and you don't have to worry Aki said but his tone is still dry