While Ketil is incapacitated, Olmar must decide the future of the war effort. Thorfinn goes to speak with Canute before he leaves the farm.

Tanjiro's group, fresh from completing their training at the Butterfly Mansion, head to their next mission, the Mugen Train. There they rendezvous with Rengoku, who arrived ahead of them. Tanjiro is overwhelmed by the always-energetic Rengoku, Zenitsu is frightened by the prospect of facing demons as usual, and Inosuke is immensely excited by the sight of the huge machine. But on this train loaded with passengers, a new battle is about to begin.

Tenshi, Ei-chan, and Shiratori all attend Kawagoe Academy. One day, they get pulled into the orbit of former conductor Haruo. He drags them into his newly founded boys choir where they suddenly find themselves performing a song in front of an audience!

One day during training, Blade is suddenly attacked by Sophie. This Sophie, however, turns out to be one of five identical clone assassins, who will do anything it takes to murder the Great Hero and prove their superiority!