Zegapain

Kyo Sogoru finds that he is the only one who can see Shizuno Misaki, a beautiful girl who invites him to play a game where he must save the world.

Kyo finds that strange things are happening in his world - like his friends disappearing from sight and Shizuno appearing only when he is alone. He agrees to continue helping her if she will appear in a film he and his friend, Ryoko Kaminagi, are filming.

As Kyo plays a game given to him by Student Council President Shima, he begins to question the reality he lives in.

May-Yu, May-Yen, and Lu Sheng are determined to save the corrupted Shanghai Server with help from Kyo and Shizuno. When the server is destroyed, Kyo discovers the truth behind what is reality and what is a dream.

Kyo convinces himself that Maihama is real and so are all his friends. However, in his increasing confusion, he fails to appear for battle when the Oceanus needs him most. The Celebrants must defend themselves against the enemy who appears at last - Abyss.

Kyo tries to prove that what he feels and experiences within his world are real, but instead becomes temperamental as he realizes that even his friends may be nothing more than illusions. When he tries to leave Maihama to affirm the reality of his world, Shizuno finally explains the truth. The Oceanus is joined by Chris and Arque Avenir.

Finally convinced that Maihama is an artificial illusion, including those cares most about, Kyo spends the day with Ryoko at the aquarium, who notices he has changed despite how he acts otherwise.

Memories that Kyo does not recall and off-hand comments from his comrades hint that Kyo's past is more complex than he realizes. Accompanied by May-Yu, he goes to see the real Maihama so he will experience the pain of reality and know why he must continue to protect his illusory world.

Chris reveals to Kyo that while the data of bodies can be reconstructed, memories that are lost can never be recovered - Arque has lost a great deal of hers from wet damage. Kyo and Ryoko get into a disagreement and Kyo questions the pain he feels from emotion.