CTRL + X (Bra) :  Org. -> Transparent (3-Step) -> Topless
CTRL + Z (Top Strap) : On/Off
CTRL + C (Panty/Garter) :  Org. -> Transparent (3-Step) -> Garter Only -> No Garter
CTRL + V (Color) :  Org. -> Alternative Color (Mostly Black)

* Tested with : Tamaki, Hitomi, Misaki, Momiji, Kokoro, Fiona, Leifang