"Gear Change Piston" refers to the ability to freely switch between piston and fellatio actions from 0 gear (slow) to 1st, 2nd... up to 5th gear (hard). It's a 100% aggressive SEX attack by a slutty woman. "Hey, how many gears can your dick endure...?" The ultimate MILF "Kazama Yumi" makes another appearance in Achijo! She uses unpredictable stimulating pistoning and teasing play to thoroughly control the orgasms of submissive men!! Defeated completely by the dominant FUCK of a voluptuous slut with no way out!! Enjoy the hellish pleasure where your dick screams and Kazama Yumi.
