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Kotarou wakes up in a deserted town, and the only thing he knows is that he must talk to the girl on the hill.

As Kagari's research continues to take its toll on her, Kotarou looks to help her out and realizes the true significance of her theory of life.

Kotarou gets the occult club back together one last time to help Kagari finish her theory. Will she make it in time?

The story returns to when Kotarou was a superhuman without a cause, the Earth-Saving Hunter.

Life changes drastically for Kotarou as Esaka invites him to join Guardian.

Kotarou returns to Kazamatsuri, where Guardian begins a fateful operation that ends in tragedy.

Unable to stay in Japan anymore, Kotarou flees to a war zone, where he comes to a standstill yet again. Will he be able to move on?

Back in Japan, Kotarou finds himself in Kazamatsuri once again, where he meets quite a few familiar faces.

As Kotarou infiltrates deeper into Gaia and learns more about the group, he is forced to make a choice that Kagari may not necessarily approve of.

In order to save Kagari, Kotarou faces off with Gaia and Guardian.

In order to rewrite Kagari’s fate, Kotarou heads toward the final battle.