Episodes

Fifteen children at a summer school program encounter the mysterious Kokopelli and agree to be testers for a game he claims to have completed recently. Soon, they are summoned into the cockpit of a giant mecha, with Kokopelli piloting. Thus the first round takes place. || Seeking adventure during a school field trip, fifteen kids stumble upon a strange man in a cave, who invites them to play a game. But it turns out, the game is all too real. Source: crunchyroll

The children start having second thoughts about the game, but a floating being known as Dung Beetle appears and teleports them to the cockpit of the mecha, which the group later dubs Zearth. On the evening of the same day, a new enemy appears, and Takeshi Waku is chosen to fight it. || A strange creature named Koyemshi introduces itself to the group. Takashi is chosen as the next pilot of Zearth, and he resolves to be a "hidden hero" and protect the Earth. Source: crunchyroll

Takami "Komo" Komoda reveals the truth to her father, and while Waku's funeral is being held, Masaru "Kodama" Kodaka is selected to be the third pilot. || Questions remain in the wake of Takashi`s death, the most pressing of which being, how did Takashi die? Both the kids, and the police, want to know. Amidst the grief and uncertainty, the next pilot is chosen. Source: crunchyroll

Kodama fights the third enemy without caring about his surroundings, causing many casualties in the process, until he discovers the meaning of losing someone important to him. || Masaru`s family life has made him come to divide the world into two types of people: those born to die, and those born to survive. When it`s his turn to fight to protect Earth, which type will he end up as? Source: crunchyroll

After the children discover the fate that awaits them, they are assembled and interrogated by the military, except for Isao Kako, who coincidentally is the next chosen pilot. || The children realize just what it means to be chosen as a pilot for Zearth. Meanwhile, the adults finally make their move, as the military gets involved, both with Koyemshi, and Zearth itself. Source: crunchyroll

The children try to find Kako without success, until Chizuru "Chizu" Honda discovers where he is hiding and tries to cheer him up. However, Kako has other plans for her. || The next pilot is Kako, but the other kids can`t find him, though Chizu has an idea of where he might be. When the next enemy appears, the military makes an attempt a first strike. Source: crunchyroll

The story of Chizu's relationship with her teacher is revealed, before she is selected to replace the deceased Kako. || With Kako dead, but the enemy still around, the next pilot needs to be selected. As the chairs spin, Chizu recalls her past and what led to her being where she is now. Source: crunchyroll

The fourth battle begins, but Chizu is more worried about taking revenge on her teacher than facing her enemy. || Chizu has been chosen, and she`s determined to do one last thing before she completes her role as a pilot of Zearth. Source: crunchyroll

Selected to fight the fifth enemy, Daiichi "Daichi" Yamura's final wish is to spend his remaining time happily with his siblings, but his plans are ruined when the battle starts sooner than he expected. || It`s Daichi`s turn in the pilot chair, but he`s not concerned about himself. Instead, he makes a decision that mirrors what his father did, all those years ago. Source: crunchyroll

Bullied by her classmates because of her mother's questionable occupation, Mako "Nakama" Nakarai, after being chosen to engage into the sixth round, resorts to extremes to arrange money enough to complete a personal project of hers in time. || Mako has always been embarrassed about her mother`s profession, the oldest in the world. But when she`s chosen to be the next pilot, she choses to see life from her mother`s eyes before her time runs out. Source: crunchyroll

Nagi, a childhood friend of Kunihiko Moji's needs a heart transplant, but so far the only compatible donor found is Moji himself. While dealing with Nagi's drama, he is selected to fight the seventh enemy. || Moji has always been good at reading the hearts of others. But when it becomes his turn to pilot, he knows exactly where his own heart will go. Source: crunchyroll

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 birth, but when she is appointed the pilot for the eighth round, she is left with little hope to be able to do so. || Maki races against time, hoping that she`ll be able to see the face of her unborn baby brother before her battle. Meanwhile, Misumi is convinced the children`s sacrifice needs to be recognized. Source: crunchyroll

During Maki's fight, the children discover the true nature of the enemies they are battling, and what really is at stake on every single bout. || The children realize that their latest fight is no where on Earth, at least, not the one they know. The awful truth behind the game comes out. Source: crunchyroll

Yosuke Kirie wonders if he will find the resolve to fight in the next battle. While Mitsumi starts to look for means to protect the remaining children, Masamitsu discovers her secret. || The friction between Misumi and the world`s economic and political powers grows stronger. Misumi pushes forward with her plan to save the children from their dark fate. Source: crunchyroll

The ninth round begins, but after witnessing his mother's miserable life, Kirie refuses to fight. Just when his companions are about to lose hope, something that nobody expected happens. || Kirie has always been the quiet one. With his gloomy demeanor, and his life a depressing mess, will Kirie even find the will to fight for an Earth he doesn`t care for? Source: crunchyroll

Given another chance, Kirie finally decides to face the enemy, but when he surprisingly unveils Machi's identity, a commotion is created among the rest of the group. || Komo`s father exposes the political coverup behind Zearth. Kirie`s mother recovers from her ills, and Kirie himself finds the will to fight. But yet another secret is revealed in the process. Source: crunchyroll

Chosen to the tenth round, Aiko Tokosumi's life is turned upside down when a scandal involving her father brings up turmoil to her household. But she ends up finding in Kanji the strength to carry on with her duty. || Anko is next in the chair for Zearth`s pilot, coinciding with the public exposure of her father`s affair. While Anko tries to leave off on something good, the plan to help the children begins to buckle. Source: crunchyroll

After Komoda was selected for the eleventh match, her father resigns from his position as a politician, but not before revealing the truth about Zearth and the children to the world. || The powers behind the coverup push back, and Komo`s father is caught in the middle. In the end, the sarcifices made will inspire Komo to fight in the same way her father did, for the Earth he loved. Source: crunchyroll

Tamotsu reveals to Jun Ushiro who his real parents were and tells him their story. || Tamotsu takes Jun out to reminisce about the past. The story he tells is of the "Climbing Dragon", a young yakuza lieutenant, and his wife, Misumi, who he had a child with. Source: crunchyroll

Machi reveals to the remaining pilots all she knows about the battles, and how she and her brother got themselves involved on them. || Swayed by years of guilt and hopelessness, Yoko finally comes forward and speaks, telling the story of herself and her brother, who is now known as Koyemshi, and the endless cycle the two are in. Source: crunchyroll

While Kanji fights the Twelfth enemy, the real objective of the masterminds is revealed. Later, Jun receives a proposal from Dung Beetle that may save his life if he accepts. || Kanji`s turn to pilot Zearth is marked by a strange setup, wherein the enemy appears to be targeting the Chutenro Tower research center. In the course the fight, they discover the ultimate purpose of this endless game. Source: crunchyroll

Jun takes Kana to her father's house, having Machi traveling with them. On the way, he reminisces about his infancy days, and later, he asks Machi's help to protect Kana from Dung Beetle's intentions. || Jun takes Kana back to her father, and asks Yoko to go along with them. Along the way, he thinks upon his life until now, and ultimately comes to a decision about Koyemshi`s offer. Source: crunchyroll

The human armies decide to intervene during the thirteenth battle, while Machi betrays Dung Beetle and becomes the next pilot in Kana's place. || Jun and Yoko`s plan to fight against Koyemshi goes into action. The thirteenth battle begins with Yoko as the pilot, and the government enacting their own schemes to deal with the enemy. Source: crunchyroll