Bokurano  

Bokurano: Ours, Bokurano ~Mou Hitotsu no Bokurano~, ぼくらの, Ours, Bokurano, notre enjeu

A group of fifteen middle school students are enjoying a summer camp near the sea until one child leads them into a cave that changes their fate forever. Inside, they find computers and Kokopelli, who offers them a game where they control a giant robot to fight enemies attacking Earth. The children agree to sign a contract by touching a shield-like object, and Kokopelli transports them to the Zearth's cockpit. An enemy mecha rises from the sea, and Kokopelli teaches them how to mentally control the Zearth, defeating it. However, the Zearth is powered by life energy, and after every battle, the pilots die. After signing their lives away, they must use their remaining time on Earth to protect it.

Bokurano was published in English as Bokurano: Ours by VIZ Media under the SigIkki imprint from February 16, 2010 to September 16, 2014.