This combo of a white and pink long sleeve shirt and shorts is proof that a simple off-duty getup doesn't have to be boring. You could perhaps get a bit experimental on the shoe front and introduce white suede loafers to your ensemble. An outfit like this will make any young guy look better than everyone else in the room.
Consider teaming a white and pink long sleeve shirt with shorts and you'll be prepared for wherever this day takes you. Bump up the wow factor of your outfit by slipping into brown leather derby shoes. Those who are curious how to pull off semi-casual looks as you go through your 20s, this combination should answer your question.