Chapter Summaries

Kurozawa practiced Sun Breathing and confirmed that it was helping his demon body adapt to sunlight while reducing the Potential Points needed for immunity. He considered how to obtain the Power of Species Annihilation, concluded the Demon Slayer World offered few options, and rested until nightfall before planning to meet Hongyue in Asakusa.

• Kurozawa practiced Sun Breathing in the forest, endured its pain, and saw that his body was gradually adapting to it.
• Kurozawa used Potential Points to eliminate the hunger caused by his Immortal Demon Body and checked his updated Status Panel, which showed Sun Breathing at the First Stage.
• Kurozawa discovered that cultivating Sun Breathing had lowered the Potential Points needed to become immune to sunlight.
• Kurozawa asked Gray-White about the Power of Species Annihilation and learned that only intelligent beings counted as a species.
• Kurozawa rejected trying to exterminate humans or demons in the Demon Slayer World and decided to seek the power in future worlds.
• Kurozawa climbed into a tree to sleep until nightfall, when he planned to meet Hongyue in Asakusa.

Kagaya Ubuyashiki awaited the Stone Pillar’s return from the Kamado Family, hoping to obtain Sun Breathing as the Demon Slayer Corps faced growing losses. The Stone Pillar returned without the technique, leaving the Corps’ hopes uncertain.

• As night fell, Kurozawa left the forest and headed toward Asakusa.
• Kagaya Ubuyashiki told Amane Ubuyashiki that the Corps needed Sun Breathing as it faced the loss of the Flame Pillar and the Flower Pillar’s uncertain fate.
• The Stone Pillar returned and told Kagaya Ubuyashiki that Tanjuro Kamado had refused to share the Breathing Technique.
• The Stone Pillar explained that he had encountered Kurozawa Danryu, who had also demanded the technique and threatened the Kamado Family.
• Kagaya Ubuyashiki accepted that Tanjuro Kamado had chosen to protect his family, though he remained sorrowful.

Kagaya Ubuyashiki accepted Kurozawa Danryu’s threat to Asakusa and sent the Stone Pillar to seek help from Tamayo. Meanwhile, Kurozawa detected a battle between two skilled swordsmen and a demon and headed toward it to gain Potential Points.

• The Stone Pillar told Kagaya Ubuyashiki that Kurozawa Danryu had threatened Asakusa and demanded Kagaya attend his wedding.
• Amane Ubuyashiki warned that Kurozawa’s real target was Kagaya, but Kagaya resolved to respond and said the Corps could survive without him.
• Kagaya sent the Stone Pillar to find Tamayo in Asakusa and discreetly tell her everything, explaining that she was a demon physician and poison master.
• Kurozawa raced through the forest, smashed through a boulder, and estimated that his increasing muscle and bone density had made him weigh nearly half a ton.
• Kurozawa sensed two high-ranking swordsmen fighting a Lower Moon-level demon and approached the battle to collect Potential Points.

Sanemi Shinazugawa and Kyo-kin fought Hakkotsuryo, Lower Moon One, whose Blood Demon Art created copies of his opponents. Sanemi discovered his copy was slower at intricate moves and began disrupting its rhythm, while Kyo-kin remained in danger.

• Sanemi Shinazugawa and Kyo-kin confronted Hakkotsuryo, who created mirrors that produced copies of both swordsmen.
• Sanemi Shinazugawa attacked Hakkotsuryo, but his copy repeatedly blocked his path and matched his sword forms.
• Hakkotsuryo explained that the copies could use their originals’ abilities but lacked demonic regeneration, while Sanemi and Kyo-kin suffered injuries.
• Sanemi Shinazugawa noticed that his copy lagged behind when performing complicated techniques.
• Sanemi Shinazugawa trapped his copy’s blade and wounded it, then used intricate attacks to disrupt its timing.

Hakkotsuryo killed Kyo-kin and ate his heart, but Kurozawa arrived and overwhelmed the demon with a massive blade strike. Kurozawa then stopped Sanemi Shinazugawa from finishing Hakkotsuryo, and the two prepared to fight.

• Hakkotsuryo joined the battle and drove Kyo-kin into a desperate position while Mirror Demon Sanemi kept Sanemi Shinazugawa occupied.
• Kyo-kin used Thunder Breathing, First Form: Thunderclap and Flash, but struck an illusion, and Hakkotsuryo tore out and ate his heart.
• Kurozawa emerged and unleashed a sweeping blade attack that devastated the area and left Hakkotsuryo a half-regenerated skeleton.
• Kurozawa broke Sanemi Shinazugawa's Nichirin Blade when he tried to cut off Hakkotsuryo's head.
• Kurozawa identified himself as Kurozawa Danryu and advanced on the wary Sanemi Shinazugawa.

Kurozawa tested Sanemi’s limits, and Sanemi awakened a Demon Slayer Mark and Crimson Red Blade during their fight. Kurozawa then overwhelmed him with a sudden attack, but a powerful blood fragrance interrupted his killing blow.

• Sanemi attacked Kurozawa with Wind Breathing’s Seventh Form, but Kurozawa countered with Water Breathing’s Eighth Form and overpowered him.
• Sanemi hurled his broken Nichirin Blade at Kurozawa, who caught it and discovered it had turned crimson and burned his hand.
• Sanemi awakened a Demon Slayer Mark, gaining strength, but realized he still had no weapon and could not match Kurozawa.
• Kurozawa used Total Concentration to close the distance, shattered Sanemi’s right shoulder with a stomp, and prepared to kick his head apart.
• Kurozawa caught the scent of an extraordinarily sweet blood fragrance as he moved to kill Sanemi.

Kurozawa fought off Hakkotsuryo’s mirror demon while Sanemi Shinazugawa lay badly injured, and the scent of Sanemi’s blood stirred Kurozawa’s demonic instincts. The chapter ended with Kurozawa recognizing that Sanemi’s blood was unusual.

• Kurozawa injured Sanemi Shinazugawa’s throat to stop him from using his Breathing Technique, then turned toward Hakkotsuryo.
• Hakkotsuryo smelled Sanemi Shinazugawa’s blood, lost control to hunger, and attacked Kurozawa alongside a mirror demon that copied his movements.
• Kurozawa discovered that the mirror demon could not truly reproduce his Secret Technique Sword Form and destroyed it with attacks coated in Pitch-Black Aura.
• Kurozawa kicked Hakkotsuryo away from Sanemi Shinazugawa, then deflected Sanemi’s concealed attempt to stab him with a broken blade.
• Kurozawa smelled Sanemi Shinazugawa’s blood, felt his demon body crave it, and told Sanemi that his blood seemed different from ordinary people’s.

Kurozawa learned that Sanemi Shinazugawa’s blood was Marechi Blood, which powerfully attracted demons, and decided to keep the injured swordsman alive for Hongyue. He spared Sanemi and Lower Rank One, then planned to gather Asakusa’s demons to prepare for the Demon Slayer Corps.

• Kurozawa used the Pitch-Black Aura to torment Sanemi Shinazugawa until Sanemi revealed that his blood was Marechi Blood, a rare type especially alluring to demons.
• Kurozawa considered eating Sanemi but decided to take him alive to Hongyue, then severed his ruined right arm to keep him from dying on the journey.
• Sanemi tried to bite Kurozawa, who knocked him unconscious without killing him.
• Kurozawa gave Sanemi’s severed arm to Lower Rank One, Hakkotsuryo, and decided to preserve the demon for his unusual Blood Demon Art.
• Kurozawa planned to gather the demons in Asakusa, discard weak demons as Potential Point fodder, and retain powerful demons to face the approaching Demon Slayer Corps.

Kurozawa tested how much Sanemi Shinazugawa’s blood strengthened Hakkotsuryo, then brought Sanemi to Asakusa. There, Kurozawa claimed demons’ numbers stayed constant whether or not the Demon Slayer Corps existed, leaving Sanemi questioning his efforts.

• Hakkotsuryo ate Sanemi Shinazugawa’s severed arm and felt his body and Blood Demon Art grow stronger.
• Kurozawa told Hakkotsuryo to prepare to report to Asakusa, then left with Sanemi Shinazugawa.
• After four days of thwarting Sanemi’s escape attempts, Kurozawa arrived with him in Asakusa.
• Kurozawa told Sanemi that demons’ numbers remained roughly constant and that the Demon King was his partner.
• Sanemi doubted Kurozawa’s claim, but the possibility left him questioning whether his actions had mattered.

Kurozawa brought Sanemi Shinazugawa to meet Hongyue in Asakusa, where Sanemi attacked her and was easily overpowered. Kurozawa revealed that Hongyue was his partner and had once been called Muzan Kibutsuji, leaving Sanemi stunned.

• Sanemi Shinazugawa rejected Kurozawa's attempt to shake his resolve, insisting that he hunted demons to avenge his family.
• Kurozawa traveled with Sanemi to Asakusa's wealthy district to meet Hongyue.
• Hongyue arrived and accepted Sanemi as a gift after recognizing his Marechi Blood.
• Sanemi lunged at Hongyue to take her hostage, but she seized his wrist and slammed him to the ground.
• Kurozawa introduced Hongyue as his partner and revealed that she had once been called Muzan Kibutsuji, shocking Sanemi.

Kurozawa and Hongyue settled into a residence in Asakusa, where Hongyue used Nakime’s Infinity Castle to imprison Sanemi Shinazugawa. After reuniting with Hanada Shizuka and finding Iguro Obanai training, Kurozawa carried Hongyue into a room and shut the door.

• Kurozawa and Hongyue arrived at one of Hongyue’s estates, and Kurozawa asked what to do with the captive Sanemi Shinazugawa.
• Hongyue commanded Nakime to open a gateway to Infinity Castle, and Kurozawa sensed the vast alternate space through it.
• Hongyue threw Sanemi Shinazugawa into Infinity Castle, where beams and chains formed a cage around him.
• Hongyue showed Kurozawa her Mutated Demon ability to control her body, briefly transforming her hand into a tentacle covered in maws.
• Hanada Shizuka greeted Kurozawa and teased him and Hongyue about having a child; Kurozawa later found Iguro Obanai training in a room.
• Kurozawa joked with the blushing Hongyue about Hanada Shizuka’s suggestion, then carried her into a room and shut the door.

After spending a day with Hongyue, Kurozawa explained his plan to destroy the Demon Slayer Corps and break the world’s cycle, while warning that Divine Will might interfere. They entered Infinity Castle to gather the Upper Moons and found Nakime waiting for them.

• After an exhausting day with Hongyue, Kurozawa wondered whether demons could have children and decided to leave the question to nature.
• Kurozawa told Hongyue he planned to wipe out the Demon Slayer Corps and sever the Breathing Technique’s inheritance, after using Asakusa’s residents as hostages to call the Corps to a final reckoning in a month.
• Hongyue agreed to gather the lower demons and summon the Upper Moons, and said she would promote Nakime to Upper Moon Six after Gyutaro and Daki’s deaths.
• Hongyue and Kurozawa entered Infinity Castle on a rising platform and headed to the place where Upper Moon meetings were held.
• Nakime appeared with her biwa, and Kurozawa sensed that her body was frail despite her control over Infinity Castle.

Hongyue summoned the Upper Moons and placed Kurozawa’s commands on equal footing with her own. Kurozawa warned them to prepare for a battle with the Demon Slayer Corps in Asakusa in one month, but the Upper Moons remained confident despite his warning about powerful new swordsmen.

• Hongyue ordered Nakime to summon the Upper Moons, and Nakime opened gateways that brought Akaza, Kokushibo, Doma, Hantengu, and Gyokko to the meeting.
• The Upper Moons gathered on a platform and noticed Hongyue’s unusually gentle manner toward Kurozawa before she resumed her commanding presence.
• Hongyue told the Upper Moons to treat Kurozawa as they would her and obey his commands, and they all accepted her order.
• Kurozawa announced that the Demon Slayer Corps would bring elite swordsmen and Hashira-class fighters to Asakusa in one month and ordered the Upper Moons to leave none alive.
• Doma dismissed the swordsmen as insignificant, so Kurozawa warned that Demon Slayer Marks, Crimson Red Blades, and possible Sun Breathing swordsmen could threaten them.

Kurozawa warned the Upper Moons about the Demon Slayer Corps’ powerful Stone Pillar and the threat posed by Marked Swordsmen, while Hongyue appointed Nakime as the new Upper Moon Six. After the meeting, Kurozawa offered to teach Hongyue Sun Breathing, and she revealed that she had previously abandoned Moon Breathing.

• Kurozawa told the Upper Moons that the Stone Pillar had a nearly demonic physique, mastered the supreme realm of fighting spirit, and used a Breathing Technique reminiscent of Sun Breathing.
• Akaza eagerly welcomed the prospect of fighting the Stone Pillar, while Gyokko dismissed the danger posed by human swordsmen.
• Hongyue appointed Nakime as Upper Moon Six, and the Upper Moons inferred that Gyutaro and Daki had been killed by the Demon Slayer Corps.
• The Upper Moons discussed guarding Asakusa and its surrounding regions before leaving Infinity Castle separately.
• Kurozawa offered to teach Hongyue Sun Breathing, and Hongyue told him she had previously learned Moon Breathing from Kokushibo but gave it up.

Kurozawa ordered the demons in Asakusa City to seal it off while forbidding indiscriminate slaughter. As demons blocked the roads and attacked civilians, the Stone Pillar helped people escape before fleeing himself.

• Kurozawa learned that the low-level demons would gather in two or three days and ordered the elite demons and Moons to seal Asakusa that night while avoiding indiscriminate slaughter.
• Hongyue relayed Kurozawa’s order, and demons raised rock walls across Asakusa’s main roads.
• Rokuro attacked a young man with a stone spike and terrorized the fleeing crowd.
• The Stone Pillar killed Rokuro, smashed a rock wall, and directed civilians toward an escape route.
• The Stone Pillar sensed powerful Fighting Spirit approaching and fled Asakusa before he could be trapped.

After killing a Lower Moon, Kurozawa confronted the Stone Pillar as he helped people flee Asakusa City, then returned to Hongyue and resumed their intimate teasing. The city remained sealed in chaos, and Kurozawa left the Demon Slayer Corps’ motives and next moves unresolved.

• Kurozawa sensed a Lower Moon die and deduced that the Stone Pillar, who possessed the Transparent World, had killed him.
• Kurozawa found the Stone Pillar escorting fleeing people, cut off their escape with Annihilation, and ordered those still outside the city to return.
• Elite demons arrived and forced the stranded people back into Asakusa City while the Stone Pillar wondered why Kurozawa had sealed the city.
• Hanada Shizuka questioned Kurozawa’s actions, but he told her the conflict would soon end and warned her to stay inside.
• Kurozawa returned to Hongyue, teased her about practicing Sun Breathing, and pounced on her after she flirted with him.

The Stone Pillar returned to headquarters with Tamayo’s demon-disrupting poison, while Kanae recovered from her encounter with Kurozawa Danryu and vowed to fight him. That night, Kurozawa hunted demons in a forest outside Asakusa to gain Potential Points, leaving the forest devastated and emerging covered in blood.

• The Stone Pillar reported to Kagaya Ubuyashiki and delivered Tamayo’s vial of poison, which could weaken demons’ regeneration and disrupt their movements.
• Kagaya checked on Kanae, who said she was ready to fight Kurozawa Danryu again despite the painful memories of Lotus Town.
• Kagaya considered Kurozawa more dangerous than Kokushibo because of his ruthlessness and the crisis he had caused for the Demon Slayer Corps.
• Outside Asakusa, Hongyue led Kurozawa to a forest where many low-level demons had gathered and used her bloodline to keep them from escaping.
• Kurozawa spent more than three hours killing demons to harvest Potential Points, then emerged from the ruined forest covered in blood as Hongyue greeted him happily.

After slaughtering Hongyue’s gathered demons, Kurozawa spent Potential Points to strengthen his abilities and asked her to spar so he could test them. Hongyue transformed into an armored combat form, and the chapter ended as their fight was about to begin.

• Kurozawa gained 5,513 Potential Points from killing nearly a thousand low-level demons, and his Power of Despair rose from 300 to 400.
• Kurozawa maxed out Water Breathing and the Higan Suzume Eye, gaining Transparent World while leaving more than 4,000 Potential Points unused.
• Kurozawa asked Hongyue to spar with him, and she agreed.
• Hongyue entered her combat state, covering herself in ruby-like armor and growing to nearly 2.7 meters tall.

Kurozawa fought Hongyue after both entered combat states, but her overwhelming speed and strength kept him on the defensive. He activated Transparent World to catch and throw her, only for Hongyue to press the attack with a massive, fanged tentacle.

• Kurozawa boosted his attributes with Total Concentration and Higan Suzume Eye, then charged Hongyue and was kicked through a stand of pine trees.
• Hongyue broke through Kurozawa's sword attacks and punched a hole through his chest, forcing him to rely on regeneration and evade her.
• Kurozawa activated Transparent World, read Hongyue's movements, caught her wrist, and threw her more than twenty meters.
• Hongyue remained uninjured and attacked Kurozawa with a huge tentacle whose gaping maw was lined with sharp fangs.

Kurozawa fought Hongyue’s monstrous transformed body, evading her tentacle barrage and close-range attacks before countering with a kick and restraining her while his Pitch-Black Aura burned through her armor. Hongyue adapted to the pain and erupted spikes from her back, leaving Kurozawa grievously wounded.

• Hongyue’s tentacles attacked from underground, severed Kurozawa’s right arm, and swallowed it before he regenerated it.
• Kurozawa enveloped himself in dense Pitch-Black Aura as Hongyue charged and attacked him with a blade-edged kick.
• Kurozawa dodged Hongyue’s kick, shattered part of her mask with a counterkick, and climbed onto her back to restrain her.
• Kurozawa’s Pitch-Black Aura burned through Hongyue’s blood armor and damaged her body as she struggled against his hold.
• Hongyue stopped struggling and burst spikes through her back, piercing Kurozawa with more than twenty holes and sharply weakening him.