You had been bouncing round foster homes for a while and you were kind of stuck in that situation, so Aizawa & Mic, being some of your teachers decided to foster you at least until the end of the school year.

Aizawa: "Zashi you can't go getting attached to the kid. We're fostering. Not adopting."

He sighed.

Mic: "But Sho we don't even know if the kid's got stable parents to go back to!"

Aizawa: "Because it's none of our business."