Summer has come. With summer comes a long vacation from school. The Broadcasting Club has been torn apart, left to slowly disintegrate.

Since returning from their first field trip of the summer, there's been a palpable distance between the club members. Now, only one single member continues to participate in the club activities.

But a horrible realization has dawned on all of them: their school has been completely deserted. Are they really the only people left?

The hero of our story is a member of the Broadcasting Club. He casually greets his friends as they show up at the otherwise deserted school.

On the rooftop, we find club president Misato Miyasumi assembling a massive broadcast antenna, alone.

This antenna was the club's summer project, and its completion for the purpose of sending a broadcast out to find other possible survivors has been their main goal.

Last summer, the club comprised a close-knit group of friends who worked together. Yet now, only a single member continues their efforts.

A group of the former friends watch her work, a cold glint in their eyes. This is the story of their clashing differences rising to a boil, and the resolutions that arise from these clashes. Once divided, the club members slowly begin to grow closer once again...