Close-up of Mizutani Kokone's stylish anus! To verify that women's anuses twitch when they feel pleasure, she stimulates her sensitive parts in a fully exposed, shameful doggy style position. As a result, the wrinkles of the anus contract continuously! Furthermore, as she starts to feel it with a piston-like penis, the entire anus begins to move, and when semen is released inside, the twitching anus drips with semen. The twitching of the anus is truly a barometer of ecstasy!!
