Illustrated by Posuka Demizu
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Now that the world has been turned upside down, the Ratri clan desperately try to reestablish a similar government and farm system to put the world back to what it was. They plan on making all the farms like Lambda so none of the children they raise as food will have free will or rise up against them again. They prepare to make one last stand against Emma and her friends back where it all began: Grace Field House. Mom has now become Grandma, the head of the whole farm system, and she wields enormous power as the leader of the Sisters who work the farms. 

After clearing the house controlled by a demon with drums, Tanjiro and Zenitus come across another strange demon slayer, Inosuke, who likes to wear a warthog mask. Inosuke has an extremely hard head, both physically and metaphorically, and he can’t stand anyone doing anything better than him. Zenitsu reveals he knew Tanjiro was hiding a demon in his backpack, but trusts that Tanjiro needs to protect her. The growing group travel to a mountain to face an unknown demon threat, and they find other demon slayers caught up in a deadly web. They find a whole family of spider-type demons all over the mountain with many kinds of traps set for the slayers. The group, including hard-headed Inosuke, must work together to overcome the demons.

Somewhere in the world, someone is trying to raise the terrible demon lord, Gyumaoh, which made all the Yokai (demons) on Earth even more violent than before. A Buddhist monk, Genjyo Sanzo, and three warriors, Son Goku, Sha Gojyo, Cho Hakkai (all of whom have some Yokai blood in them), are tasked with stopping the revival and putting things back to normal. They travel through the world in a tiny dragon that can transform into a Jeep, and fight many battles along the way. The son of Gyumaoh tries to thwart the warriors, and he sends several of his henchmen to stop them or slow them down long enough for the revival to go off as planned.

Illustrated by Posuka Demizu
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Norman's diabolical plan to eradicate the demons gets underway in this volume, despite Emma and Ray racing to the capital to try to stop him.  First, Norman and his team blow up the bridges into the Demon Capital, so escaping is going to be tricky. Then, they invade the palace and pit the demon nobles up against each other along with their ally demon, Geelan, We also get all of the backstory on Geelan and how he came to be banished. Meanwhile, Emma and Ray navigate the demon capital trying to get to the castle to stop Norman before he goes too far. The Demon Queen, Legravalima, proves to be a hugely formidable foe, and her strength proves how she has managed to stay on top in a violent demon society.

Musashi ​and his childhood friend, Kojiro, learn the legend of the Bushi - demon fighting warriors who use their katanas to fight even in the name of humanity. The only problem is, the two of them seem to be the only ones who think the demons are bad. Musashi hides his dream to become a Bushi and instead goes to school to become a miner, but he fashions his pickaxe to be a katana and continues to hone his skills in sword-fighting. On the day Musashi goes out to the mines, he discovers that his sword practice was well worth it, and that his dream of becoming a Bushi is much more obtainable than others made him believe.

Illustrated by Posuka Demizu

Emma and Ray have entered the playground of one of the most powerful demons in the world. They are there to renegotiate The Promise, the agreement between humans and demons that set the world up the way it is today. Norman is also prepared to march with a group of super-soldiers, who look strikingly like the incredibly strong Adam, and he is planning on taking his forces to the Imperial Capital of the demons. He sends Gilda and Don to find the “Evil-Blooded” demons, under the pretense that he wants to protect them from the war that is about to break out with all demon-kind. Don and Gilda know, however, that Norman wanted to get rid of the two nice demons, so they have to find a way to keep Sonja and Mujika safe. Emma finally cracks the riddle that will lead her to making a new promise, but she may have to sacrifice something much more than she’s willing in order to get it.

Tanjiro and Nezuko help the demon doctors fight off two attacking demons, and we see more of the skills Tanjiro has learned in his training.  Later, the two are off to their next assignment, but Tanjiro interrupts a desperate demon slayer trying to get a girl to marry him.  This slayer, Zenitsu, is deathly afraid of demons and fighting, and asks Tanjiro to protect him on his mission.  The two come across a house of demons where a few humans have been abducted.  Outside are two siblings, and their brother is inside the house. Tanjiro and Zenitsu enter to try to save everyone.  They get separated, and Zenitsu, despite his whining, reveals that he has extreme strength and speed, but only while he is sleeping.  Tanjiro battles against the master of the house, who has drums on his body that shift the room and lob devastating attacks.

Illustrated by Posuka Demizu
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Norman forms an alliance with a demon clan that has been on the outs for 700 years, hoping a demon civil war will take out most of the demons’ society. Emma reveals to Norman that she doesn’t like his plan of demon genocide and wishes there was a peaceful way for everyone to coexist. She tells Norman of Mujika, and Norman reveals he has heard of her but thought she was dead. Her presence complicates his plan. Emma strikes a deal with Norman - she wants to go to the Seven Walls and try to rewrite the agreement between humans and demons so that no one, not humans and not demons, has to die. Emma and Ray set off to try to renegotiate the Seven Walls or find another way to save all the demons from genocide.

Illustrated by Posuka Demizu
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While still on their trek to a new safe location provided by Mr. Minerva, a few of the kids have to break into a mass production farm to steal medicine for Chris, who isn't doing so well.  For some of them, this is the first time they've seen the inhumane treatment of children at a mass production farm.  Not everything goes according to plan, and Emma’s life is seriously threatened.  After the raid on the farm and the administration of medicine, the group finally makes it back to the base of their mysterious supporter, but it’s not the William Minerva they expected they'd meet - it’s someone from the past at Grace Field House.

Illustrated by Posuka Demizu

Emma and her family have to abandon their shelter after the assault from the Ratri clan.  The kids find a temporary shelter in the woods from back before they found the shelter, but that becomes compromised when they realize that they are being watched by mechanical owls.  One of the kids reveal that, just before they left, a message came through from some possibly allies and they were given a place to travel to, once again, in hopes of finding some human-sympathizers and allies.  It isn't an easy feat to move the large group of children through a demon-infested forest, but Emma, Ray, and the rest are able to start their trek and protect everyone from rabid, hungry demons.