{V*Y} TWNSTR Undies Set - Unicorn DOTW

I didn't try the demo for these because the ad shows it is for Tweenster, and it didn't cost too much anyway. The tank is cute but ONLY fits the GIRL Tweenster chest. I thought "small chest" in the description meant the flat Tweenster chest, but it does not. Also, the bottoms fit fine in the front but NOT in the back. They don't seem to be rigged to the shape well enough; they clip through the body when you're moving around.