My new favorite pattern line is Silhouette Patterns. I have made a few things, that I don't have photos of, but I do have a photo of this - Sunny's Top - since my teenager used me for her High School photography class.
There is an 'undershirt', a tank top underneath the layers of fabric. The tank top has the dart sewn into it. The only edit I made was to add two inches to the top layer (yoke) to make sure my chest was appropriately covered.
You can watch a video from Peggy Sagers with variations of how to sew this shirt HERE.