Chapter Summaries

Mitsuri Kanroji’s awakened mark changed as Bai Yue reassured her about her hair, while the two shared an intimate moment. At Mt. Fujikasane, Kanae and Shinobu learned that Upper Rank One had killed Bai Yue at Swordsmith Village, then received an urgent correction to the report.

• Mitsuri Kanroji asked whether fully awakening her mark could let her live longer, and Bai Yue told her about Tsugikuni Yoriichi surviving past eighty.
• Mitsuri Kanroji worried that her sakura-colored hair would make her future children seem strange, and Bai Yue reassured her that it suited her.
• Bai Yue showed Mitsuri Kanroji that the heart-shaped mark on her neck had turned sakura-colored, and they shared an intimate moment as she noticed her weight gain.
• A crow told Kanae that two members of the Twelve Kizuki had attacked Swordsmith Village and that Upper Rank One had killed Bai Yue.
• Shinobu questioned the crow about the attack and learned it had fled after witnessing Bai Yue’s death; another crow then arrived with a correction.

Shinobu learned that Mitsuri and Yue were safe, then Mitsuri returned to Mt. Fujikasane and was embarrassed when the others realized what had happened during her journey. At the warehouse, a former demon appeared to have become human, while Kanae asked Yue to help Tamayo fulfill her delusion and recover her clarity.

• Shinobu received updates that Mitsuri and Yue were unharmed and continued overseeing the Final Trial on Mt. Fujikasane.
• Mitsuri returned with Yue, and Shinobu teased her about gaining weight before Yue’s embrace caused her to faint from embarrassment.
• Kanae and Aoi discovered Mitsuri’s close-fitting clothing and realized that others knew about her intimate encounter with Yue.
• Mitsuri and Aoi hurried to the warehouse, where Kanae said a demon appeared to have become human and Tamayo hoped Yushiro could recover too.
• Kanae asked Yue to take Tamayo to rest, believing his help could let Tamayo fulfill her delusion and regain her clarity.

Tamayo asked Bai Yue for the blood she believed she needed to revive her child, but he refused to die for her and instead agreed to cooperate with her. Meanwhile, Shinobu’s group returned from Final Selection and found a demon who had become human safely sitting in the sunlight at the cabin.

• Tamayo asked Bai Yue for a large amount of his blood to replace hers and stop her delusions, but he refused to give it to her.
• Bai Yue agreed to help Tamayo revive her child and revealed that he was interested in her; Tamayo silently accepted his advances.
• Six candidates passed Final Selection, and Shinobu worried that the Demon Slayer Corps was losing members faster than it could replace them.
• Shinobu and the others secretly escorted the candidates partway down the mountain before leaving the Ince Unit to continue watching them.
• At the cabin, Shinobu found a woman who had returned to being human and had spent the morning safely in sunlight; Kanae said the woman planned to join the Butterfly Mansion.
• Mitsuri burned food while daydreaming, and Aoi scolded her for failing to watch the fire.

Bai Yue guided Tamayo through her delusion of pregnancy and childbirth, while Kanae reassured her that they could be happy together. As Tamayo’s imagined labor began, Nezuko shrank into a tiny toddler to stand in for the newborn, leaving the others scrambling to help.

• Aoi kept Kanae, Nezuko, and Shinobu away from the cabin while Bai Yue helped Tamayo fast-forward through her imagined pregnancy.
• Kanae told Tamayo they could be happy together instead of separating after the child was born.
• Tamayo began to go into labor, and Shinobu prepared a wooden doll as a fake baby.
• Nezuko transformed into a tiny toddler, and Shinobu carried her into Tamayo’s room as a more convincing stand-in.
• Kanae urgently called for a bucket, and Mitsuri rushed to fetch one but was splashed along with Shinobu.

Tamayo emerged from her delusions after Bai Yue accompanied her through decades in her spiritual world, and she resolved to resume researching how to turn demons back into humans. Bai Yue then tested his theory about awakening marks through intense sparring, leaving Shinobu’s mark clearer but still unstable.

• Tamayo apologized to Bai Yue for her willfulness and said she had awakened and would no longer run away.
• Tamayo returned to reality in the mountain cabin, thanked Kanae and the others, and resolved to continue her research.
• Tamayo explained that she had become something like Nezuko, while Bai Yue described her as transforming into a New Human.
• Bai Yue proposed testing whether intense experiences could activate marks and sparred with Shinobu.
• Shinobu lost to Bai Yue seven times, and her butterfly-shaped mark grew clearer but faded somewhat when she rested.

Kanae asked Aoi and Kanao whether they would accept Yue’s intimate method for awakening their marks instead of undergoing dangerous training. Aoi agreed, and Kanae asked her to explain the method to a stunned Kanao.

• Kanae called Aoi and Kanao aside and asked whether they wanted to awaken their marks quickly.
• Kanae asked Aoi what she thought of Yue and explained that his method might help them become stronger before the coming battles.
• Aoi blushed but agreed to try the method, while Kanae reassured her that she would not mind.
• Kanae told Aoi to explain the method to Kanao, who froze and then blushed when she understood.
• Kanae asked Kanao whether she was willing to try it.

Kanae Kocho and Tamayo studied how intense stimulation affected the Demon Slayer marks, finding that Shinobu’s mark became clearer when her temperature neared 39°C and her heart rate exceeded 200. The experiment also revealed a faint mark in Kanae’s pupil, while the chapter ended with another participant’s mark fully surfacing.

• Aoi Kanzaki and Kanae discussed their feelings for Bai Yue, and Kanae asked Kanae Kocho to decide what she should do.
• At the cabin, Kanae Kocho, Tamayo, and Aoi observed Shinobu’s experiment and recorded the observers’ physical measurements.
• Shinobu’s temperature rose to about 39°C and her heart rate exceeded 200, making her butterfly-shaped mark surface before it faded again as she fainted.
• Aoi spotted a faint mark in Kanae’s right pupil, and Kanae Kocho confirmed that it changed during the experiment.
• During a later experiment, Shinobu reported that the current subject’s heart rate exceeded 200 as Tamayo measured a temperature nearing 40°C, and the subject’s four-leafed flower-petal mark surfaced completely.

Shinobu helped awaken Kanae’s mark during the experiment, while Aoi and Tamayo also became involved in the group’s mark research. Elsewhere, Nezuko revealed her fire ability, and Bai Yue began another blood-replacement experiment to become a true esper.

• Shinobu teased Kanae during the mark-awakening experiment, and Kanae’s mark became clearer as Shinobu’s poison-related ability was revealed.
• Tamayo recorded the experiment while Aoi developed an incomplete mark, and Shinobu urged Tamayo to join the experiment to increase its resonance.
• Nezuko used her ability to set damp firewood alight as Mitsuri helped her and the Oyakata sisters prepare dinner.
• Mitsuri approached the experiment room and heard the commotion inside, while the Oyakata sisters developed faint marks after hearing it.
• Bai Yue began replacing his blood with Tamayo’s again and told Kanae not to anesthetize him so his thoughts would remain unaffected.

Tamayo, Nezuko, Kanae, and Shinobu received specialized knowledge from Bai Yue, including a plan to use a virus to turn demons back into humans. Meanwhile, Muzan threatened the Twelve Kizuki with a one-month deadline, and Kagaya Ubuyashiki revealed that his family was related to Muzan by blood.

• Tamayo sensed Muzan’s transformation, and crimson mist became a white-winged figure that gave knowledge to her, Nezuko, Kanae, and Shinobu.
• Tamayo, Kanae, and Shinobu learned a plan to create a virus that would weaken demons and gradually turn them back into humans.
• Muzan berated the Twelve Kizuki for failing to find the Blue Spider Lily or the person he had ordered them to locate, then gave them one month to produce useful information.
• Kanae could not treat Kagaya’s worsening illness, and Sanemi suggested turning him into a demon before Kyojuro punched him.
• Kagaya stopped the argument and explained that the Ubuyashiki family was related to Muzan by blood.

Bai Yue explained that the Ubuyashiki family's illness came from the hatred of Muzan’s victims and that killing Muzan would only gradually weaken the curse. With medicines ready and the Corps preparing a plan to draw Muzan out, the chapter ended at the overwhelmed Butterfly Mansion as Aoi’s assistants reported a problem with medicine production.

• Bai Yue told the Hashira that the Ubuyashiki curse came from the dead victims of Muzan and would fade only gradually after Muzan’s death.
• Tamayo said Master Ubuyashiki had at most two months to live, and confirmed that medicines for combating oni had been developed.
• Master Ubuyashiki agreed to mobilize his family’s resources as the Corps planned mass medicine production, further training, and a trap using the Ubuyashiki headquarters, Tamayo, and Nezuko as bait.
• Aoi Kanzaki managed the Butterfly Mansion’s medicine production while postponing her mark experiment, and Kanae pursued separate training to activate her mark.
• Three of Aoi’s assistants reported that a batch of medicine had come out a different color, and Aoi told them to explain calmly.

Kanae pushed herself through Hashira-level training and collapsed after using a dangerous stimulant, so Bai Yue treated her with massage and medicine. The next day, Mitsuri Kanroji supervised Kanae's training, then secretly followed her after it ended.

• Aoi Kanzaki directed injured trainees to the nurses and showed Aoi how to use new medical equipment from Swordsmith Village.
• Aoi found Kanae unconscious after she overexerted herself, and learned she had used a stimulant to endure Hashira-level training.
• Bai Yue massaged Kanae and applied medicine to ease her fatigue, helping her recover quickly.
• Aoi warned Kanae to train moderately and never use stimulants again.
• Mitsuri Kanroji supervised Kanae's training until sunset, then secretly followed her.

Kanae received Bai Yue’s restorative massage after training, while Aoi Kanzaki brought dinner and challenged him to a cooking contest. Bai Yue wagered that if he lost, he would help Aoi activate her mark, leaving her nervous and eager to learn how.

• Kanae visited Bai Yue for his daily treatment to recover from Hell training, and he massaged her fatigued muscles.
• Aoi Kanzaki delivered dinner, admitted she had cooked Bai Yue a special meal, and joined him for dinner while Kanae appeared to sleep.
• Bai Yue and Aoi agreed to a cooking contest and invited Kanae to judge their food.
• Bai Yue proposed that if he lost the contest, he would help Aoi activate her mark, and she asked what method he would use.

Muzan learned that Tamayo’s medicine was preventing humans from becoming demons, while the Demon Slayer Corps confirmed its treatment could purge demonic blood and began preparing for the decisive battle. Amane asked Bai Yue to awaken her Mark, and Tamayo revealed that Amane’s ability should be precognition.

• Kokushibo reported that the Twelve Kizuki had found neither the Blue Spider Lily nor Tamayo, and Doma said the Demon Slayer Corps had stopped hunting demons.
• Akaza told Muzan that his blood had failed to turn a group of Demon Slayers into demons and showed him their list of medicinal ingredients, prompting Muzan to suspect Tamayo’s research had advanced.
• At the Butterfly Mansion, Tamayo and Kanae confirmed that the infected Ince Unit members were purging Oni’s blood and that imprisoned demons who bit them were changing back.
• Bai Yue used multiple bodies to help the Demon Slayer Corps recover as they rested after training and prepared for the coming battle.
• Amane asked Bai Yue to awaken her Mark, and Tamayo said Amane’s ability should be precognition.

Amane sought Bai Yue’s help activating her incomplete Mark, which gave her precognitive visions, while Doma learned from Kaigaku that the Demon Slayer Corps had a cure for Oni and planned to bait Muzan into a trap. The chapter ended with the Kizuki gathered at Infinity Castle as a Demon Slayer transformed into an Oni.

• Amane showed Bai Yue her partially activated Mark and explained that she had foreseen events, including a brief vision of Muzan Kibutsuji.
• Doma’s followers warned him as Kaigaku arrived, claiming Kokushibo had introduced him and revealing that he had returned from being an Oni to human.
• Kaigaku told Doma that the Corps had developed a drug that could turn Oni human, and that Tamayo could endure sunlight without eating human flesh and blood.
• Kaigaku revealed that the Corps planned to lure Muzan into a trap, and Doma considered whether the news threatened his place among Muzan’s Twelve Kizuki.
• Doma brought the intelligence to Infinity Castle, where the gathered Oni watched a Demon Slayer accept Muzan Kibutsuji’s blood and successfully transform.

Muzan learned from Kaigaku that Tamayo had developed demon-to-human medicine and overcome sunlight, so he launched an attack before the Demon Slayer Corps could use their plan against him. He found the Ubuyashiki Estate and began fighting Master Ubuyashiki, who faced him with a strange smile as the battle intensified.

• Muzan read Kaigaku’s memories and learned that Tamayo had overcome demons’ weakness to sunlight and was preparing medicine and a trap for him.
• Former Hashira, including Kuonji Jigoro, prepared to take their positions while the Demon Slayer Corps used Kaigaku as bait.
• A white-haired woman at the Butterfly Mansion recovered from a blinding experience and found that her vision of Muzan had become clearer and started moving.
• As night fell, Master Ubuyashiki asked Amane to lead the Hashira meeting and present the plan, but Muzan arrived at the estate before it could be shared.
• Master Ubuyashiki stood, took up a sword, and fought Muzan, who dodged his first attack and answered with barbed whips.
• Despite his failing strength and the blood he coughed up, Master Ubuyashiki smiled, prompting Muzan to attack with both whips.

Muzan Kibutsuji was crippled by Tamayo’s drug during his attack on the Ubuyashiki estate, while the Demon Slayer Corps continued fighting the demons under a coordinated plan. As the battle spread toward Tamayo, Doma was beheaded for the third time and realized the medicine would keep him from regenerating.

• Muzan Kibutsuji realized Tamayo’s drug had been dispersed through the fog, and it corroded his body until he could barely move.
• Amane stayed beside her dying husband and sent Aoi Kanzaki to treat the wounded; Aoi spread more medicine before teleporting back to the Butterfly Mansion.
• At the Butterfly Mansion, Hina Tsuyuri reported that the Flame Hashira’s side needed treatment, while the sisters’ abilities helped monitor the battlefield and coordinate support.
• In Infinity Castle, Nakime told Muzan Kibutsuji that more than half the Lower Rank Demons and three Upper Rank Demons had died, while the Demon Slayer Corps was also suffering heavy losses.
• Doma’s head was severed for the third time, and he realized the anti-demon medicine had weakened him so much that he could no longer reattach it.

Kanae and the other Hashira defeated their opponents while the Butterfly Mansion prepared to save Tengen Uzui and lure Muzan Kibutsuji into a trap. Muzan tracked Tamayo to her house and pulled it into Infinity Castle, where he attacked her and the man beside her.

• Kanae killed Upper Rank Two, then disguised a humanized Oni's corpse to conceal her survival from Muzan.
• Aoi brought Kanae to the Butterfly Mansion, where she and Shinobu began treating the critically injured Tengen Uzui.
• Muzan learned Tamayo's location from a Lower Rank Demon and went after her, while Bai Yue guarded her as bait.
• Muzan controlled Nakime and the Lower Rank Demons, turning their bodies into a door that swallowed Tamayo's house and transported it into Infinity Castle.
• Muzan shattered the house with a thorn-whip attack and prepared to seize the man embracing Tamayo.

Muzan Kibutsuji faced a radiant, godlike figure whose light destroyed Nakime and collapsed the Infinity Castle, then mistakenly believed he had survived when the light vanished. Tamayo revealed that Muzan had become one of the dead, and the souls of his victims seized and devoured him.

• Muzan Kibutsuji used Nakime's ability to shut the doors on the godlike figure, but the figure forced its way back into the Infinity Castle.
• The god's light burned Nakime away, causing the Infinity Castle to collapse into the real world as the Pillars watched.
• Muzan attacked the godlike figure, but his strikes crumbled before reaching it and his body began to melt.
• The light flashed and vanished, restoring Muzan's human appearance and leading him to believe he had won.
• Tamayo told Muzan that he had not become human, and the translucent spirits of his victims appeared and tore into his soul.

After Muzan Kibutsuji died, the Demon Slayer Corps disbanded and later reorganized as the Dimensional Execution Agency to guard against new threats. Nezuko, Aoi, and Kanae traveled to Bai Yue’s residence, where he prepared to take them to the agency’s headquarters; the chapter then showed Bai Yue waking with the twin sisters Hangnai and Kanata after their relationship changed.

• Muzan Kibutsuji was devoured by the souls of his victims until dawn, ending the demons’ connection to him and the Demon Slayer Corps’ long war.
• The Demon Slayer Corps confirmed that demons had vanished, honored its dead, and accepted the remaining Ubuyashiki family assets from Lady Amane.
• A year and a half later, Nezuko left home and met Aoi Kanzaki and Kanae, who had subdued a person harming others with an awakened mark.
• Aoi transported Nezuko and Kanae to Bai Yue’s residence, where he explained that travel to the Dimensional Execution Agency headquarters was now possible.
• Bai Yue woke as Hangnai and Kanata helped him wash and dress, and he told them to leave the room’s cleanup until after breakfast.

Nearly ten years after Muzan’s defeat, Bai Yue traveled with Sakaigami Izayoi, Kasukabe Yao, and Kuon Asuka to the world of Hakone, where Black Rabbit explained its Gift Games and tried to recruit them. The three then watched a huge object fall from the sky, leaving Black Rabbit unable to explain what was coming.

• Bai Yue reunited with Hinagi, Hika, Amane, and others, and they discussed how they had stopped conspiracies and a near-global war since Muzan’s defeat.
• After finding the address in a letter, Bai Yue went to the Dimensional Execution Agency Headquarters and traveled toward the world that had sent an invitation.
• Bai Yue and two women appeared high above an unfamiliar world, fell through layers of membrane, and landed in an amber lake.
• Sakaigami Izayoi, Kasukabe Yao, and Kuon Asuka introduced themselves and explained that each had received a strange invitation.
• Black Rabbit explained Hakone World, its Gift Games, and the need to join a Community, while trying to persuade the three to join hers.
• Izayoi, Yao, and Asuka spotted a huge object falling from the sky, and Black Rabbit admitted she did not know what it was.