Akari Minase is the experimental subject who will be developing the inexperienced acme spot ``Portio''. Akari is half-convinced whether it really feels good, so she prepares an extra-large dildo. - If you masturbate while inserting it up to the entrance of the cervix, you will climax in no time! - Portio, which was still under development, was prepared one after another by big dick actors. - Akari Minase, who has been developed deep inside with a dick that reaches her navel, screams out an animal-like gasping voice and cries out countless times!