I bought some oil that's been talked about on the street and thought I'd try it on my girlfriend, but I decided to try it on my step-sister Kokoro to see if it really worked. It worked better than I expected, and she became surprisingly lewd. She straddled my face and sucked my dick so hard that it was covered in drool, and she held it between her tits and wouldn't let go until I ran out of semen (lol). A total of six stories of naughty pranks played on six step-sisters.