In the past, Hayuru helps people evacuate Japan for a Megafloat. Kizuna is offered free use of the Academy baths, but finds Hayuru Himekawa there to both their embarrassment. Commander Reiri later tells them that she arranged the encounter to further their relationship and raise Hayuru's Hybrid Count. Commander Reiri introduces a new simulator room to Kizuna, not for mock battles with Magitechs, but to facilitate Hybrid Heart activities. Kizuna evaluates the simulator successfully with Yurishia. Meanwhile, although all communications between the Megafloats is broken, they receive a weak signal from Guam. Kizuna, Aine, Yurishia and Hayuru are sent to Guam to investigate. They find devastation, but Kizuna and Hayuru find a woman called Aldea with Heart Hybrid Gear who claims to represent the Empire of Batlantis in the other dimension. She overpowers them and calls on a powerful three-headed dragon Magitech from the other dimension to destroy them. Rather than suffer defeat, Kizuna orders the team to retreat.