The year is 2061, when space travel is now possible and commercially viable, and the students of Caird High School embark on their Planet Camp. But soon after Group B5 arrived at their planetary campsite, a mysterious and unforeseen sentient light sphere warps its 9 members into outer space, stranding them 5012 light years away from their home planet. With the discovery of an old, unmanned spaceship nearby, the students must stay strong, manage their limited resources and remain united in the darkness of space, so that all of them can survive their long and likely perilous trek back home aboard the Astra.

Notes: Won Manga Taisho Award in 2019.