Rive is chosen by Ruga to be his opponent. Though these two used to fight side by side as a pair, Ruga scolds Rive for running away from his fear of fighting against Ruga.

The work study students from U.A. attend a meeting of heroes gathered by Sir Nighteye and leave with new resolve.

Vulcan gets settled in at the 8th, while Captain Obi meets with Hibana, Konro, and Karim to exchange data on the White-Clad matter. Konro proposes that Shinra and Arthur be given combat training in Asakusa to improve their fighting skills.

Lyria, Io, and Orchis have been swallowed by Celeste. Left behind, Gran and the others search for a way to save them, along with a ghost girl, Ferry, whom they met in the village.

While conducting their business in Dormant, Masato adds a young girl named Roo to their party, and he continues to laugh audaciously in the face of Neutscheland Trading Company's cowardly plans. Meanwhile, winter comes to Elm Village and Tsukasa works on a plan out of concern for their safety. Thanks to the actions of Sarutobi Shinobu, a descendant of ninja and the world's top journalist, they develop a vague understanding of the forces in this new world, such as Frejyagard Empire, the large nation controlling much of this world. They also learn of the lost faith, the Seven Light Faith, which leads to more mysteries as he searches for a way to return them to their old world. During all of this, danger descends upon the peaceful Elm Village.

Hiroto and Kazami have made a small but very important improvement in their relationship. However, the Build Divers and the Resistance are now overwhelmed by the attack of the mysterious Gunpla known as "Seltsam." The pendant that Muran entrusted to Hiroto and the others seems to become a key to turn the tide, but… Meanwhile, May begins gathering intelligence at Magee's bar.

The North Patria Union tries to quickly exterminate all of the Incarnates before the impending war. The captain of the Coup de Grace, Claude, had appeared in the port town of Port Gulf. Schaal is also there and happens to hear a beautiful singing voice. She heads toward the cave that the voice is coming from and encounters the Incarnate Siren, otherwise known as Beatrice, and her friend Charles.

"From now on I'll do everything I can for you with all my heart." That's what the new girl at school said to me! Finally a kind girl appears before me… Yeah, right!