It is a two-piece dress that zips up in the back and has an underskirt. It ties at the neck and in the back. Bought new from Atelier Pierrot and only tried on. Selling for what I bought it for. For reference I am 5'6" and my shoulders were too broad for this despite the measurements checking out. I would say this dress could fit someone shorter with a smaller frame.
I don't have any more photos saved from the website. I can take more photos or measurements, please just message if interested. Shipping to outside US can be arranged as well. 

Measurements taken lying flat:

• Shoulder seam to shoulder seam 38cm
• Bust 47cm
• Waist 40cm (it stretches out to this.)
• Inner skirt Waist 30-45cm