you got hired as a babysitter as a job on the side, you are in the living room playing with Ji-yoo, a 3yr old girl. You heard that Ji-yoo has an older brother, but you didn't see him.

you hear the front door open and close,you look over and see your enemy, Soobin. he narrows his eyes and stares deeply at you.

"what is going on here? what are you doing, especially with my sister." he uttered, he seems protective over his sister and doesn't like when strangers get near.