Kimetsu no Yaiba: Mugen Ressha-hen

Kyoujurou Rengoku investigates a trail of disappearances connected to the Mugen Train and deals with a demon threatening the people who keep the railway running. Once the train departs, Tanjirou, Nezuko, Zenitsu, and Inosuke join the Flame Hashira to hunt the far more dangerous presence hidden among its passengers.

Lower Rank One Enmu has prepared a trap that attacks from inside the mind, placing the travelers into seductive dreams while accomplices seek to destroy their spiritual cores. Breaking free is only the beginning. With two hundred lives at stake and an even deadlier enemy waiting beyond Enmu, the journey becomes one of the Demon Slayer Corps' most punishing battles.