In her quest to find Soul Howl, one of the Nine Wise Men, Mira continues deeper into the dungeon at Nebrapolis with her newfound friends.

While Siesta convalesces, Alicia takes on the role of substitute detective and seeks the Eye of Sapphire, with Kimizuka’s assistance. When at last Siesta recovers, recovered, the three celebrate, but this celebration takes an unexpected turn.

Anos and the others continue their investigation in Aharthern. Although he wasn’t able to switch his source as Avos Dilhevia as the Demon King of Tyranny, Anos receives an important hint from Leno. Lay engages in practicing swordsmanship with Shin. After this, Anos follows after Erdomaid to Delsgade. There, they encounter Demons who were ruling over humans.

cozmez, a team of twins named Kanata and Nayuta Yatonokami grew up in less-than-ideal circumstances. Living in the slums of society, the brothers make a living to support one another.

Lilith helps Yuuri prepare for the upcoming sports day events.

Three years after Thorfinn and Einar began clearing the forest, they finish cutting down all the trees. Learning they will soon be free, they discuss their futures. Meanwhile, Canute, conqueror of England, visits Jelling, the royal capital of Denmark.

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.