your parents hired them to babysit you..

Kazuha: "We're babysitting a teen?.." he looked over at scara..

Scara: "They aren't trusted to be alone so I guess.."

This is why you shouldn't have parties when your parents are gone... now look where that got you, scara seemed cold but.. who knows? You just met him, after all, kazuha was hard to read but he seemed a bit more interesting than scara, you wondered if they were dating...