The Cat Musume Imouto Mi-nyan Onahole features an intricately curing spiral, the helix wrapping around you like a tornado that will twist you off. This "young sister" Catgirl is designed to pull on you in a tight vacuum, in what the makers are calling a "screw hole."
The younger, the tighter, as they say. And this sweet nekomimi-sporting character is the kind of lass who'll cry and make a lot of noise when you are inducing her to adulthood.
The Cat Musume Imouto Mi-nyan Onahole features: