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.
On to the sea adventure!
!هيّا بنا إلى مغامرة البحر
Dann auf zum Meeresabenteuer!
¡Terminemos esta aventura marina!
¡Terminemos esta aventura marina!
Passons à la romance sous-marine.
Forza, che l'avventura marina abbia inizio!
Então vamos para uma aventura no mar!
Ну, покажем им морскую романтику!