This is a VERY BASIC nipple skin that works with Kasumi's Deluxe Costume.  You will need the following mod (or similar) to remove the bra:   I repeat, this is a VERY BASIC skin. Other modders are currently working incredibly hard to produce realistic nude mods. This skin is only intended to give a slight realism to the revealing mods in the meantime.   A massive thanks to everyone for making the tools that have allowed this mod to happen