So, structurally speaking, shouldn't the middle picture with the bra have another strap, overlapped by the underside of her breasts, stretching over the Xyphoid Process? (The very bottom of the sternum) Otherwise, why are the parts of the bra below the existing strap curving inward? Yes, it might be explained by a very firm wire, or possibly ninja magic, but it we're talking about magical underwear, why are there any straps? :)