The time has come. The long-awaited mission has started. What awaits in the train is a nightmare within a nightmare itself. Who will win? The Demons? Or The Slayers? [Kimetsu No Yaiba x BoBoiBoy Galaxy] [Direct sequel to Demon Slayer: BoBoiBoy] DISCLAIMER: Demon Slayer: Kimetsu No Yaiba belongs to Ufotable, manga written by Gotōge. BoBoiBoy/Galaxy belongs to Animonsta Studios.