Leviathan Volume 1: Volume 1

The Leviathan, an enormous spaceship, drifts in spaces, abandoned in a galaxy far, far away. When looters break into the abandoned ship, they discover the diary of a middle-schooler, Kazuma, who documented the horrific fate of its passengers. Shocked, the looters read on, but as they do, they reach a chilling realization. there is still one survivor somewhere inside.