Chapter Summaries

Hakuji reunited with Koyuki and her father after Akaza’s defeat, then disappeared with them. Muzan tried to recall Hantengu but learned that Nakime could not locate him, while the author’s note explained plans to accelerate the story toward its final battle.

• Koyuki called Akaza Hakuji, restoring his memories, and he wept as he apologized to her.
• Koyuki comforted Hakuji, and the three souls departed together after thanking Kanzaki Kumo.
• Muzan raged over Akaza’s death and ordered Nakime to bring Hantengu back to the Infinity Castle.
• Hantengu avoided Akaza and Kanzaki Kumo’s battle, then pursued the evacuating villagers while Nakime failed to locate him.
• The author explained that the story would move faster toward the final battle, with everyday and romance scenes saved for a later side-story volume.

Kanzaki Kumo killed Hantengu after discovering his hidden main body, while Kanae held off Zohakuten and helped escort the villagers. Muzan witnessed Hantengu’s beheading through their connection.

• After confirming Akaza had disintegrated, Kanzaki Kumo headed toward the evacuated villagers and destroyed Nakime’s searching eyeball.
• Kanzaki Kumo found Hantengu’s hidden main body and saw his four clones pursuing the villagers near Kanae.
• Hantengu fled when Kanzaki Kumo confronted him, and his clones merged into Zohakuten and turned back toward their main body.
• Kanae pursued Zohakuten to keep him from interfering while Kanzaki Kumo beheaded Hantengu with Thunder Breathing.
• Zohakuten dissolved after Hantengu died, and Kanae returned to escort the villagers as Muzan witnessed the beheading through Hantengu’s consciousness.

Muzan panicked at Kanzaki Kumo’s challenge, killed his human wife, and ordered Nakime to find Kumo and send Upper Ranks after him. Kumo helped the Swordsmith Village escape Nakime’s pursuit, and the chapter ended with the group reaching a new location while Kumo and Kanae prepared to return to the Butterfly Mansion.

• Muzan remembered Yoriichi Tsugikuni after sensing Kanzaki Kumo’s challenge, killed the woman posing as his wife, and burned the books in his study.
• Muzan returned to the Infinity Castle and ordered Nakime to find Kanzaki Kumo and teleport Doma or Kokushibo to him.
• Kanzaki Kumo and Kanae watched dawn approach as the Kakushi led the Swordsmith Village residents away using false trails, while Kumo destroyed Nakime’s tracking eyes.
• Nakime lost track of the villagers and Kumo, then received Muzan’s delayed instructions and searched multiple trails until Muzan gave up and punished her.
• A day later, Kanzaki Kumo, Kanae, the villagers, and their escorts reached the Swordsmith Village’s new location, and Kumo and Kanae prepared to return to the Butterfly Mansion.

At a Hashira Meeting, Sabito complained that Kanzaki Kumo and Kanae had killed two Upper Ranks before he could reach the Swordsmith Village, while Giyu’s blunt remarks left the others laughing. The group learned that Sabito understood Giyu’s meaning, and the chapter ended with everyone thanking him except Giyu.

• Haganezuka caught Kanzaki Kumo and Kanae leaving the Swordsmith Village, so they handed over their Nichirin Blades for maintenance and stayed until the next day.
• At the Ubuyashiki Estate, Sabito shook Kanzaki Kumo and complained that he had killed more than half the Upper Ranks while Sabito had not fought any.
• Kanzaki Kumo told Sabito that Kokushibo and Doma were still alive, but Sabito admitted that fighting the strongest Upper Ranks would likely cost him his life.
• Giyu asked why Kanzaki Kumo did not take on an Upper Rank himself, prompting the Hashira to laugh and Kanzaki Kumo to suggest that Giyu stake out Doma’s cult with him.
• Giyu refused, and the Hashira interpreted his silence as a sign that he knew he was not strong enough to help; Sabito had to explain Giyu’s meaning, and everyone thanked Sabito except Giyu.

After sparring with Giyu, Kanzaki Kumo hurried to Town to visit Kanzaki Keizan’s grave, hoping to learn whether his grandfather’s spirit still lingered. There, he finally saw Kanzaki Keizan and greeted him after years apart.

• Kanzaki Kumo challenged Giyu to a sparring match, and Giyu reluctantly accepted.
• After the Hashira Meeting, Kanzaki Kumo left to visit Kanzaki Keizan’s grave and test his belief that his grandfather’s spirit remained nearby.
• Kanzaki Kumo rushed to Town, remembering how Kanzaki Keizan had died suddenly when he was a child and had watched over him ever since.
• Kanzaki Kumo reached the grave at dusk and saw Kanzaki Keizan beneath the moonlight.
• Kanzaki Kumo greeted Kanzaki Keizan, and his grandfather welcomed him back.

Kanzaki Kumo reunited with Kanzaki Keizan and spent the night telling his grandfather about the years they had been apart. As dawn arrived, Kanzaki Keizan accepted that his grandson had grown up, and the two said goodbye before he disappeared.

• Kanzaki Kumo greeted Kanzaki Keizan, and their laughter eased the distance of their long separation.
• Kanzaki Kumo recounted his training, friendships, battles, and relationships while Kanzaki Keizan listened.
• Kanzaki Keizan realized that Kanzaki Kumo no longer needed him to linger in the world, and Kanzaki Kumo chose not to dissuade him.
• Kanzaki Kumo and Kanzaki Keizan exchanged farewells as dawn broke, and Kanzaki Keizan walked into the rising sun and disappeared.

After returning to the Butterfly Mansion and being welcomed by his family, Kanzaki Kumo studied a thunderstorm in the courtyard to deepen his understanding of lightning and Thunder Breathing. As rain and lightning engulfed the grounds, he began to move in rhythm with the storm, with lightning shimmering around him.

• Kanzaki Kumo returned to the Butterfly Mansion, where his family welcomed him and he reassured them by saying, "I'm home."
• Kanzaki Kumo reflected that the Blue Spider Lily might restore Muzan to ordinary human health, but decided he would never give it to him and that Muzan had to be exposed to sunlight.
• A powerful storm arrived, and Kanzaki Kumo used the Transparent World to observe the patterns of lightning.
• Kanzaki Kumo drew his Nichirin Blade and practiced movements inspired by the storm, blending traces of every form of Thunder Breathing.
• As the girls watched anxiously from beneath the eaves, lightning shimmered around Kanzaki Kumo while he continued moving unaffected by the storm.

Kanzaki Kumo created a powerful new Thunder Breathing move but was struck by lightning while boasting in the rain. The girls revived him, and after an examination he appeared to have suffered only minor injuries.

• Kanzaki Kumo realized his new move required activating his Demon Slayer Mark and could not be fully performed otherwise.
• Kanzaki Kumo celebrated his achievement in the rain, raised his Nichirin Blade, and was struck by lightning.
• Kanae and the other girls carried Kanzaki Kumo indoors and, under Shinobu Kocho's direction, performed first aid until he woke.
• Kanzaki Kumo apologized to the worried girls, assessed his injuries, and stood up despite pain throughout his body.
• The girls took Kanzaki Kumo for an examination, which found that the lightning had left only minor traces and damage.

Tamayo successfully tested a drug that turned the demon cat Chachamaru back into a normal cat, proving that demonization could be reversed. The Corps celebrated the breakthrough, and Tamayo considered whether the treatment might help Tanjuro, if he agreed to it.

• With Doma still missing, Kanzaki Kumo and the others used captured demons for drug trials while Tamayo continued her research.
• Tamayo injected the refined drug into Chachamaru as the Hashira and Amane watched.
• Chachamaru woke as a normal cat and returned to Tamayo, and Tamayo and Shinobu Kocho confirmed the transformation had succeeded.
• Amane praised Tamayo, who credited her collaborators, Kanzaki Kumo's blood samples, and the Ubuyashiki Clan's funding.
• Tamayo realized the treatment might help Tanjuro, though he would have to consent to temporarily becoming a demon.

Tamayo and Kanzaki Kumo brought a treatment plan to the Kamado family that would temporarily turn Tanjuro into a demon before attempting to restore him to human form. Despite the risks, Tanjuro agreed to be the first subject, hoping the treatment might also help Tanjiro survive future injuries.

• Tamayo began preparing the materials to turn humans into demons and the medicine to turn demons back into humans.
• After Tanjuro's condition worsened from using the Transparent World to guide Tanjiro, Kie secretly asked Butterfly Zemu to examine him, and he estimated Tanjuro had at most a year left.
• Tamayo and Kanzaki Kumo arrived at the Kamado home at night and explained the treatment to Kie, Tanjiro, and Nezuko.
• Kie took Tanjiro and Nezuko to discuss the risks with Tanjuro, who revealed he had heard the conversation and agreed to the treatment.
• Tanjuro firmly accepted the experimental treatment, and Kie, Tanjiro, and Nezuko reluctantly agreed.

Tamayo treated Tanjuro with a medicine that briefly turned him into a demon, repairing the damage to his internal organs before she reversed the transformation. Tanjuro woke clearheaded and relieved, and Butterfly Zemu prescribed a recovery regimen as Kie and the children thanked their helpers.

• Tamayo gave Tanjuro the medicine while Kie, Tanjiro, and his sister watched from the doorway and Kanzaki Kumo stood guard.
• Tanjuro's demonic transformation consumed his reserves while repairing his damaged internal organs, leaving him dangerously depleted.
• Tamayo injected the reversal drug, and Tanjuro's demonic traits disappeared as his complexion and breathing improved.
• Tanjuro woke with a renewed sense of weakness but said his hollowed-out feeling was gone and thanked Tamayo.
• Butterfly Zemu examined Tanjuro, prescribed nourishing medicine, and explained to Kie how to support his recovery with meals.
• Kie and her children thanked Kanzaki Kumo and the others, and Kanzaki Kumo accepted their gratitude.

After Tanjuro recovered enough to walk, Kanzaki Kumo and Butterfly Zemu left the Kamado home. Tanjiro realized that Nezuko had developed romantic feelings for Kumo, but she avoided discussing them, leaving Tanjiro confused.

• Kie prepared food while Tanjiro and Nezuko helped watch over Tanjuro as his condition stabilized.
• Tamayo returned to her residence that night, and the following day Tanjuro joined his family in seeing Kanzaki Kumo and Butterfly Zemu off.
• Kanzaki Kumo invited Nezuko to visit the Butterfly Mansion, and Nezuko secretly nuzzled against his hand.
• Tanjiro smelled Nezuko's growing affection for Kumo and struggled with the idea that his sister might join Kumo's circle of romantic partners.
• Nezuko cut off Tanjiro's attempt to ask about her feelings and hurried back inside, while Tanjiro caught a hint of panic and guilt from her.

Kanzaki Kumo considered activating his Demon Slayer Mark, but Butterfly Zemu warned him against risking his life. At the Butterfly Mansion, the others continued their training and research as Kumo’s eighteenth birthday and fifth year as a Demon Slayer approached.

• Kanzaki Kumo thought about testing his Demon Slayer Mark now that Tamayo’s treatment could potentially reverse its side effects.
• Butterfly Zemu noticed Kumo seemed set on doing something dangerous and warned him, while Kumo denied having any such plan.
• Kanzaki Kumo and Butterfly Zemu returned to the Butterfly Mansion, where Kumo avoided his future father-in-law’s aggrieved stare.
• Kanae and Makomo continued training and patrolling, while Mitsuri and Kanao improved their skills ahead of the next Final Selection.
• Shinobu Kocho intensified her poison research with Tamayo’s help because her latest poison had not worked as well as hoped against Akaza’s blood.
• Kanzaki Kumo kept training, patrolling, and waiting for Doma as his eighteenth birthday and fifth year as a Demon Slayer drew near.

Kanzaki Kumo celebrated his eighteenth birthday at the Butterfly Mansion, where everyone gathered for a warm party. After the guests left, Makomo and Kanae prepared for the private milestone they had been anticipating.

• As Kanzaki Kumo's eighteenth birthday approached, Makomo, Kanae, and others at the Butterfly Mansion waited expectantly, while Kanao sought a hug from her big brother.
• On the day, the mansion's residents wished Kanzaki Kumo a happy birthday as Kiyo Terauchi and the other two girls went about their usual duties.
• Aoi Kanzaki and Mitsuri brought out a cake with eighteen candles, and everyone sang to Kanzaki Kumo.
• Kanzaki Kumo blew out the candles, cut the cake, and shared it with the gathered family.
• After the celebration, the others exchanged glances and left, while Makomo and Kanae showed their anticipation as the private main event began.

Makomo and Kanzaki Kumo reminisced about their nearly five years together before spending their first night as a couple. The chapter ended with Makomo resting against Kanzaki Kumo after their intimacy.

• Makomo invited Kanzaki Kumo to walk with her in the moonlit courtyard after Kanae left.
• Makomo reflected on how their relationship began and how the girls in Kanzaki Kumo's life had grown close.
• Makomo told Kanzaki Kumo she had no resentment or regrets about choosing him, and he embraced her in agreement.
• Makomo led Kanzaki Kumo to her bedroom, where they spent the night together.
• Makomo lay against Kanzaki Kumo afterward as he held her tenderly.

After Makomo recovered from their intimate encounter, she sent Kanzaki Kumo to spend the night with Kanae. He entered his room and found Kanae waiting in a revealing outfit chosen by Shinobu Kocho, leaving him visibly overwhelmed.

• Makomo asked Kanzaki Kumo for water, and he helped her drink while she rested in his arms.
• After regaining some strength, Makomo urged Kanzaki Kumo to go to Kanae and told him not to hurt her.
• Kanzaki Kumo cleaned Makomo, changed the bedding, tucked her in, and left her room.
• Kanzaki Kumo worried that Kanae might have heard him and Makomo through the wall before entering his bedroom.
• Kanae greeted Kanzaki Kumo in a translucent purple dress Shinobu Kocho had chosen, and he swallowed as he admired her.

The morning after spending the night with Kanae, Kanzaki Kumo cared for her before going to check on Makomo. He found Makomo awake and helped her dress, as both women recovered from the night before.

• Kanzaki Kumo woke beside Kanae, covered her shoulder, and reflected on his love for her and Makomo.
• Kanae woke and blushed as she remembered the night before, then rested while Kanzaki Kumo went to check on Makomo.
• Kanzaki Kumo found Makomo still asleep and quietly watched over her until she woke.
• Makomo asked whether Kanae was awake, and Kanzaki Kumo handed her clothes and gently dressed her when she reached for him.

Kanzaki Kumo’s morning with Kanae left Shinobu Kocho and Butterfly Zemu resentful, and Shinobu rearranged breakfast seating to keep Kanae away from him. Breakfast ended with Zemu silently fuming while the household settled into an awkward, warm routine.

• Shinobu Kocho caught sight of Kanae’s shredded outfit and pulled her sister away from Kanzaki Kumo, leaving an angry “Hmph!” behind.
• Butterfly Zemu appeared behind Kanzaki Kumo with a murderous glare, then Kocho Delia led him away after he grumbled resentfully.
• At breakfast, Shinobu Kocho moved Kanae beside herself and refused to speak to Kanzaki Kumo, while Kanae promised to explain later.
• Mitsuri enthusiastically fed Kanao until Kanzaki Kumo stepped in, and the two girls’ growing closeness helped restore the table’s warm atmosphere.
• Butterfly Zemu glared at Kanzaki Kumo and imagined him flirting with Shinobu Kocho until Kocho Delia smacked him, and breakfast ended in an uneasy mood.

Kanzaki Kumo waited outside Tamayo’s laboratory while she and Shinobu Kocho worked on a drug targeting Muzan. Their successful breakthrough brought the Demon Slayer Corps closer to preparing for a decisive battle against him.

• Kanzaki Kumo headed to Tamayo’s laboratory to learn how the research on drugs against Muzan was progressing.
• Yushiro blocked Kanzaki Kumo from entering, explaining that Tamayo and Shinobu Kocho had ordered him to keep everyone away during their experiment.
• Kanzaki Kumo waited and reflected on Tanjuro’s recovery, his decision to join the Demon Slayer Corps without becoming a Hashira, and his work monitoring Doma.
• Tamayo and Shinobu Kocho emerged from the laboratory and announced that they had succeeded.
• Shinobu Kocho excitedly threw herself at Kanzaki Kumo, forgetting her agreement with Kanae to ignore him for the day.

Kanzaki Kumo and Shinobu Kocho discussed the latest drugs Tamayo had developed to weaken Muzan, and the group prepared to lure him out. Months later, Upper Rank Two Doma searched for the Blue Spider Lily at night and felt helpless because his investigation was going nowhere.

• Kanzaki Kumo comforted Shinobu Kocho, then followed her as she pretended to ignore him and ate the food he had brought.
• Tamayo reflected on the family she had killed after Muzan deceived her, while Yushiro tried to reassure her.
• Shinobu Kocho described three experimental drugs, including one that could suppress demon-cell activity enough to stop Muzan from splitting apart.
• The group completed the four drugs intended for use against Muzan and began preparing a plan to lure him out.
• Months later, Doma asked a frightened woman for information, then continued searching the town for the Blue Spider Lily despite finding no one willing to help.