The latest in the Nippori Gift and Kiteru series of "half-mature succubus" toys is this Hanjuku Succubus Makaizou Devil Modification Air Pillow. The blow-up holder fits a range of small- and medium-sized onaholes, adding girth and body to your grip. The texture is realistic and natural, so it feels like you are holding the slinky body of a succubus. Blow this cushion-holder up, slide in your favorite onahole, and then you are good to go!
The Hanjuku Succubus Makaizou Devil Modification Air Pillow features: