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.
Only I can locate the enemy
underwater.
أنا الوحيد القادر على تحديد موقع العدو
تحت الماء
Soy el único que detecta al enemigo
bajo el agua.
Soy el único que detecta al enemigo
bajo el agua.
Je suis le seul en mesure
d’y repérer les ennemis.
Solo l'unico in grado di individuare 
dove si trovi il nemico in acqua.
Só eu posso localizar o
inimigo debaixo d'água.
Только я могу определить
положение врага в воде.