After their split, Akito struggles to move on even as Kaya reaches out with quiet affection. Her hopes dim when he remains haunted by memories of Aoi, who has grown closer to their P.E. teacher Shudo. Meanwhile, Kaya finds herself entangled in a troubling scheme orchestrated by an unseen watcher, one that stirs unexpected feelings toward the same teacher and hints at a deeper design behind the unfolding events.