Fifteen children at a summer school program encounter the mysterious Kokopelli and agree to be testers for a game he ...

The children start having second thoughts about the game, but a floating being known as Dung Beetle appears and telep...

Takami "Komo" Komoda reveals the truth to her father, and while Waku's funeral is being held, Masaru "Kodama" Kodaka ...

Kodama fights the third enemy without caring about his surroundings, causing many casualties in the process, until he...

After the children discover the fate that awaits them, they are assembled and interrogated by the military, except fo...

The children try to find Kako without success, until Chizuru "Chizu" Honda discovers where he is hiding and tries to ...

The story of Chizu's relationship with her teacher is revealed, before she is selected to replace the deceased Kako.

The fourth battle begins, but Chizu is more worried about taking revenge on her teacher than facing her enemy.

Selected to fight the fifth enemy, Daiichi "Daichi" Yamura's final wish is to spend his remaining time happily with h...

Bullied by her classmates because of her mother's questionable occupation, Mako "Nakama" Nakarai, after being chosen ...

Nagi, a childhood friend of Kunihiko Moji's needs a heart transplant, but so far the only compatible donor found is M...

Maki Ano is in awe as her foster mother is about to have a baby. She hopes to at least witness her little brother's b...

During Maki's fight, the children discover the true nature of the enemies they are battling, and what really is at st...

Yosuke Kirie wonders if he will find the resolve to fight in the next battle. While Mitsumi starts to look for means ...

The ninth round begins, but after witnessing his mother's miserable life, Kirie refuses to fight. Just when his compa...

Given another chance, Kirie finally decides to face the enemy, but when he surprisingly unveils Machi's identity, a c...

Chosen to the tenth round, Aiko Tokosumi's life is turned upside down when a scandal involving her father brings up t...

After Komoda was selected for the eleventh match, her father resigns from his position as a politician, but not befor...

Tamotsu reveals to Jun Ushiro who his real parents were and tells him their story.

Machi reveals to the remaining pilots all she knows about the battles, and how she and her brother got themselves inv...

While Kanji fights the Twelfth enemy, the real objective of the masterminds is revealed. Later, Jun receives a propos...

Jun takes Kana to her father's house, having Machi traveling with them. On the way, he reminisces about his infancy d...

The human armies decide to intervene during the thirteenth battle, while Machi betrays Dung Beetle and becomes the ne...

Jun declines Seki's offer and becomes the pilot for the final round. During the long battle, he reminisces about his ...