ASOS Black Long-Sleeved Backless Romper

A black dressy romper purchased from ASOS by brand "Rare." Tie closure at the back of the neck and backless styling. The main fabric is stretchy, the gauzy fabric used for the long sleeves is not. Size is UK 8, which translates to US 6. Brand new without tags (the string for the tag is still attached), never worn, tried on, or washed.