This OVA collects three side stories from the world of Ajin, where a small fraction of humanity turns out to be near-immortal beings who revive after death. The first episode follows a stranger whose fatal accident reveals him as an Ajin, echoing what once happened to protagonist Kei Nagai. A lighter second episode strings together comedic vignettes with the wider cast, and the third traces how the antagonist Satou's capture as the first known Ajin reshaped him into the person now hunting Kei. Bundled with the manga's eighth and ninth volumes, the shorts sit outside the TV continuity.