[Machine Translation] Soji, Aika, and Touar, the Twintails, have established the Twintails Club. Their activities are to protect twin tails and world peace. Touar, who is in charge of science and technology, has newly started to produce the third tail gear, which has special specifications that enable it to transform into a big-breasted girl when it is transformed. When Aika, a poor girl, learns of this, she puts aside her pride and begs to have it for herself... Meanwhile, the otherworldly perverted monster group Ultimegil, which has increased its strength, is divided into two factions, one with big tits and the other with small tits, and a civil war is about to break out. In the midst of this chaos, a warrior under the direct command of their leader, Dark Glasper, descends upon them.