Slide the Onahole Booster Yumushii into the included holder for a better grip that will allow you to thrust and push powerfully into her. This special set of a onahole and "booster" holder sleeve creates the sensation of tentacle sex, the long and thin inside of the onahole lined with teeth-like nubs the whole way to nibble on you as you push in.
Technically here the onahole is Yumushii and the holder is the Booster. This means there is nothing to stop you enjoying Yumushii's unique tentacle grip by itself, or even switching out the Yumushi and inserting other onaholes toys you have to enhance sessions with them.
The Onahole Booster Yumushii features: