Eternal Party.The entirety of Judgment joins Kuroko and the others in fighting off against STUDY's mechs. Meanwhile, Mikoto and Febri arrive at STUDY's hidden base at a stadium, fighting off against the mechs that Aritomi sends against them. STUDY responds by sending a signal to cut off everyone's communications and sending more advanced mechs after each group. However, they overcome this thanks to Erii and Banri setting up a network of telepaths, with Kazari and Ruiko piloting their own mech that Mitsuko's father sent over, whilst ITEM help to destroy the mechs sent after Mikoto. Mikoto and Febri soon arrive at the underground base, where Aritomi, having no other plans to stop her, resorts to initiating the final phase in which he reveals his secret weapon: a cluster missile from space containing Diffusion Ghost that will destroy Academy City and everyone who is in it, by causing a chain reaction with the city's AIM fields. Aritomi attempts to kill himself, only to be stopped by Mikoto, who is determined to save everyone. With the assistance of the Sisters, Mikoto rides in Mitsuko's mech and launches into the atmosphere, using the mech as ammunition for a massive railgun to destroy the missile. After freeing Janie from STUDY's control and reuniting her with Febri, who is given more neutralizer lollipops, Shinobu makes plans to bring the twins to an overseas research facility to cure their condition. After saying their goodbyes to Shinobu and the twins, Mikoto and the gang discuss their upcoming vacation.