Good Boy Gone Bad

Cathy and Ryder met in 2nd grade and instantly became best friends. Then Cathy moved away in 4th grade and never saw Ryder again, or did she? Now Cathy is 18 and lives with her best friend; Crystal. A new kid moves in the same age and his name is Ryder. But this guy he's wayyyy different than the Ryder that Cathy knew. The Ryder Cathy knew was a kind brown haired boy who always got good grades and was shy. This Ryder had black hair, a pierced lip, and was the most biggest jock ever! Always failing and getting horrible grades. Yet they shared the same face. Could it be the Ryder that Cathy knew and if so why the sudden change.