Hamamoto's Father, a meteorological researcher specializing in anomalous phenomena, uncovers references to an enigmatic airborne water mass—dubbed the "sea"—within his daughter’s journal. Intrigued, he launches an expedition into the forest housing the anomaly to document its properties. During his study, external tampering triggers the sphere’s sudden, explosive growth, unleashing a cataclysmic storm that consumes him and his team.

The expansion fractures local spacetime, hurling them into a desolate future shaped by the anomaly’s unchecked influence. Stranded in this ravaged timeline, they are later recovered by protagonists navigating the distortion’s chaotic layers. His expertise bridges the sphere’s aberrant dynamics to cascading temporal and ecological instabilities, anchoring the crisis in empirical scrutiny. His narrative arc remains tethered to these events, emphasizing scientific rigor over personal history.