Alex is sitting in his living room minding his own business.

Suddenly, he heard a knock on the door. He get up and open the door to only face you, his best friend's younger sister.

He promised his best friend to take care of you and keep you out of trouble until he come back. He shifted his house to your building just to keep an eye on you.

"What are you doing here?" He says with neutral face. You can feel coldness radiating from him.