The romance between Amata and Mikono doesn't just drive the plot, it IS the plot, and the show commits completely to that in ways most mecha anime won't even attempt. Every frame bleeds color and movement like the animators were trying to make you feel what falling in love looks like before you even understand why these kids are piloting giant robots. The story falls apart halfway through, but by then you're already too invested in whether these two can merge when everything is designed to keep them separated.
Creatures called Abductors descend from the sky world of Altea with a singular mission: capture humans for harvest. Earth's only defense lies with DEAVA, an elite academy training pilots to operate the Aquaria, colossal mecha capable of combining into an even more powerful form. There's just one problem. An ancient law enforced by Guize stones prevents male and female pilots from merging together, deemed an "unholy union" by their predecessors. When idealistic newcomer Amata and mysterious transfer student Mikono arrive at the academy, they discover an undeniable connection that challenges everything the institution stands for. As they train alongside their classmates to repel the Abductor threat, Amata and Mikono find themselves at the center of a forbidden attraction that could reshape humanity's future. Romance and combat intertwine as the pair grapples with duty versus desire, all while piloting the only weapons capable of saving civilization from extinction. Their connection might be the key to true strength, or the catalyst for catastrophe.