"Ma ○ ko Device Bondage" has sacrificed more than 20 naked beautiful women. This time, it is the first time in its long history that two people are tortured together with W iron restraint. "Yui Hatano" and "Hibiki Otsuki" have been trapped in genuine iron restraints since ancient times. Two people who are close to each other blame each other, or two people are blamed at the same time ... The frenzied feast that is more chaotic than ever invites M sex to a deeper depth. Which one is Mako awakening first?