This is a product of trying dodge things, but it works perfectly well.   For mod user: It is nothing fancy, just replace the leather short to mini-skirt and short boots to long boots.  In the "Material" folder of this mod there are 4 files for optional undies: "MPR_Muscle_Character_LEICOS106_d01.ktid.black","MPR_Muscle_Character_LEICOS106_d01.ktid.pink","MPR_Muscle_Character_LEICOS106_d01.ktid.purple",and "MPR_Muscle_Character_LEICOS106_d01.ktid.white". Delete the default pin