This movie is a cartoon parody for adults of Foster's Home For Imaginary Friends series, featuring Frankie Foster and Bloo. Despite the fact that this is a parody content is very naughty and explicit as Bloo fucks redhead from behind.
Seen that cartoon series about hot redhead chick who lives among various monsters in some creepy mansion? Yeah, the one that is called "Foster's buddies for imaginary buddies". And now you can explore this mansion by yourself and finally make the things right - these monsters must not just wondering around the lots of rooms and corridors but must find out the way to seduce Frankie! And you are going to help them with that!