Try pairing a grey overcoat with a white long sleeve shirt for a neat classy ensemble. For something more on the dressier side to finish this outfit, complete this outfit with black leather derby shoes. In this, any teenage guy will put most of his peers to shame.
If the setting calls for a casually sophisticated outfit, you can wear a grey overcoat and a white long sleeve shirt. Black leather derby shoes are the most effective way to inject an added touch of class into this ensemble. As you're going through your adolescence, you probably want to look older than your age. That's when inspiration like this comes in handy.