An ultimate work entirely dedicated to anal torture! To push Yui's anus to its absolute limit, a series of experienced M men appear one after another. In the first part, guest dominatrix Ramii Kannazuki—specializing in anal play—uses a lighted anal speculum and anal dilators to deeply penetrate and visually expose Yui's anus, maximizing both visual and physical pleasure. This is followed by intense anal fisting with an extra-thick strapon dildo, driving Yui to climax. In the second part, carefully selected extreme torture devices are used to stretch Yui's anus beyond its limits. An ultra-long dildo probes deep into her intestines, and finally, massive vibrators and an American king-size anal plug stretch her anus to the extreme. Enjoy the lewd, uncontrollably twitching spasms of Yui's anus, completely beyond her own control!