The Forbidden Star.The elected members are chosen for a concert on Baltistar, a planet completely under the entertainment ban. Meanwhile, the 77th generation of understudies are chosen to infiltrate a nearby military base undercover in order to investigate reports of important business people visiting the base. As the concert begins, drawing out the DES forces, the understudies begin their mission and start gathering intel. During their investigation, Nagisa, Yūka and Makoto discover a hidden casino where elite members gamble on how long the concert will last. As they attempt to investigate further, Makoto inadvertently blows their cover. However, due to an apparent stroke of luck, they manage to escape to a garbage disposal and report their findings to Tsubasa. The girls decide to target the nuclear reactor hidden somewhere in the base so they can shut down the casino and escape, with Orine's team using a stolen mech to help them. As Makoto laments her usefulness, Higashino, the DES guard that helped them escape, gives her his support and helps her to shut down the reactor, gaining her own Kirara in the process.