In the year 2063, mankind's domain stretches across the vast expanse of the universe. Eight students from Caird High School, along with a young child, embark for an exciting interstellar camp on the planet MCPA, which is located nine light-years from their home. Among them are the brave and athletic Kanata Hoshijima and the cute and bubbly Aries Spring.

However, once the students arrive at MCPA, a strange ball of light starts chasing them. This mysterious sphere engulfs the students and sends them to a harrowing fate: a remote area of space located 5,012 light-years from safety. Hopelessly lost and quickly running out of resources, the students' only chance of returning home proves to be aboard a nearby abandoned spaceship, where their desperate fight for survival begins and the dark truths surrounding their deadly excursion are slowly revealed.

Kanata no Astra was published in English as Astra Lost in Space by VIZ Media under the Shonen Jump imprint from December 5, 2017 to December 4, 2018.