Shiro just exhales. This is a very tired expression. A long-suffering expression.

"It's... a long story. Gist of it was - he figured he had no future anyway, so may as well." A shake of his head. "I was recruiting pilot candidates at his school - his teachers weren't going to let him into the program with his disciplinary record. So... he stole my car."

The very bare bones of the story there.