This game is animated hentai parody on well-liked television animation series"Johnny Test". If have not seen this animation or have no idea that it even exist you should actually know one thing about it - they have red-haired twins in it who loves to invent some items! Yep, their names are Mary and Susan - like in the title of the game. And today they are going to examine their new invention - fucking machine with numerous manipulators (in other words - a robot with a plenty of of metal tentacles). This seems to be avery significant project for both them and that is why they are testing it again and over and over. Just click on the screen to see them nutting and provide them several seconds to rest and they'll be ready to cu... err testing !