I scrolled a bit and found this posted from someone else:
"use only the sexy bad girl outfit, hair at least level 2, use critical eye + critical eye immune"
I didn't get an S, and I was missing the necklace, but I still managed to pass the darn level (with an A)

You're probably past it by now, but you don't necessarily need a "bathrobe" or "towel". I used the kimono "Aster" and added other stuff that filled the styling requirements. (Eg: cute, lively, or whatever it was.) Anyway, I still managed an S rank.

I feel your pain...