Chapter Summaries

Bai Yue helped Tamayo test a medicine that severed Rui’s connection to Muzan Kibutsuji, though it also destroyed Rui’s oni regeneration and left him to die in sunlight. After Mitsuri returned, Bai Yue asked Tamayo to turn him into an oni so he could help her research, then sought Kanae’s consent.

• Rui tried to trigger Muzan Kibutsuji’s curse by saying his name, but the curse did not activate after Tamayo’s medicine severed his connection.
• Tamayo observed that Rui’s oni regeneration had disappeared, and Shinobu opened a window so sunlight could end his life.
• Mitsuri and her sister returned after escorting the awakened villagers away from Mount Natagumo.
• Bai Yue asked Tamayo to turn him into an oni and proposed a blood transfusion to overcome the purifying effect of his blood.
• Tamayo thanked Bai Yue for offering to endure the painful experiment, and he asked Kanae whether she consented.

After Kanae accepted his feelings, Tamayo transformed him using her blood, but the change severed her connection to him and produced a being whose power surpassed Muzan's. The chapter ended with the transformed figure intimidating everyone as an explosion destroyed part of the house.

• He kissed Kanae, and she bashfully agreed to begin while Tamayo prepared her equipment.
• Nezuko drank his blood, Mitsuri Kanroji tried some and then drank a bowl of it, and Tamayo began injecting her blood into him.
• His body changed as Tamayo's blood entered him, but Tamayo's connection to him suddenly vanished as his heartbeat accelerated and a blood-mist cocoon formed.
• He emerged with silver hair, red horns, eighteen blood-red wings, and golden eyes that displayed the word God.
• His overwhelming pressure left Tamayo, the Shinobu sisters, and the captured demons helpless, and an explosion smashed apart half the building.

Bai Yue instantly annihilated Gyokko and five Lower Rank Demons after Nakime teleported them to Mount Natagumo. Muzan Kibutsuji learned their connection had been severed, while Tamayo watched Bai Yue disappear and wondered whether he had died or left.

• Nakime teleported Gyokko and five Lower Rank Demons to Mount Natagumo, where they encountered Tamayo and Bai Yue.
• Gyokko sensed Bai Yue’s godlike presence and tried to flee, but his consciousness abruptly ended.
• Muzan Kibutsuji questioned Nakime about the severed connection, attacked her in anger, and hesitated to teleport to Mount Natagumo himself.
• Bai Yue compressed the space around the demons into a small sphere, leaving a crater where they had stood.
• Tamayo watched Bai Yue dissolve into points of light and wondered whether he had died or departed.

Bai Yue explained that demons were superpowered humans and identified Mitsuri Kanroji as someone born with an awakened ability, while Kanae resolved to study superpowers and ways to control them. At Mt. Fujikasane, Aoi Kanzaki comforted the nervous Kanae as they prepared to enter the Demon Slayer Corps’ Final Selection.

• Bai Yue explained that demons were superpowered humans whose powers came with dangerous physical changes and a hunger for human flesh.
• Tamayo, Shinobu, and Kanae considered the threat demons posed and the possibility of researching how humans could develop or suppress superpowers.
• Bai Yue told Mitsuri Kanroji that her unusual strength meant she had been born with an awakened superpower, and she happily accepted the explanation.
• Kanae decided to investigate how humans could awaken superpowers and how those powers might be restrained before they caused harm.
• Aoi Kanzaki held Kanae’s hand near Mt. Fujikasane as they waited for the Final Selection trial to begin.

Kanae and Aoi joined Final Selection just as demons attacked Mt. Fujikasane, while Hina Tsuyuri revealed that half the Twelve Kizuki had been exterminated. The candidates reached the mountainside and prepared to defend themselves, but the advancing demons broke through and killed one participant.

• Kanae and Aoi arrived at Mt. Fujikasane, where a scream and ominous gazes alerted them to demons gathering nearby.
• Hina Tsuyuri warned that more than twenty demons were surrounding the area and said the attack might be Muzan’s retaliation for the extermination of half the Twelve Kizuki.
• Hina explained that Upper Rank Five and all the Lower Ranks had been killed on Natagumo Mountain, mostly by the person who had eliminated Upper Rank Four.
• Kanae and Aoi cut Wisteria flowers and scattered them along the path as they led the candidates up the mountain.
• The candidates gathered at the mountainside and took defensive positions as demons cleared the Wisteria from their path.
• A demon hurled a ball at the group, striking one participant and exploding their head.

Bai Yue saved Kanae and the others from the oni attacking Mt. Fujikasane, then met the girls overseeing Final Selection. Kanae discovered an eighteen-wing mark on his back, and Hina Tsuyuri explained that the Corps’ records linked marks to extraordinary swordsmen.

• Kanae protected the panicked Aoi from an oni’s ball, but a final fragment was stopped when the oni’s own head flew in front of her.
• Bai Yue appeared amid the fallen oni, having defeated them with blood-coated spiked knuckle-dusters, and introduced himself to Kanae as her brother.
• Bai Yue met Hina Tsuyuri and Ubuyashiki Hinana, who were overseeing Final Selection without guards, and questioned their acceptance of death as fate.
• Five participants withdrew and two were killed; Kanae was declared qualified after she alone had turned back to strike the ball.
• Kanae noticed an eighteen-wing mark covering Bai Yue’s back, and Hina Tsuyuri said the Demon Slayer Corps’ records associated marks with gifted individuals.

Hina Tsuyuri explained the Demon Slayer marks and the danger they posed, while Bai Yue and the others took shelter at the selection cabin. Aoi Kanzaki massaged Bai Yue despite his fever and unusually tough muscles, and Kanae joined her as they watched over him.

• Hina Tsuyuri told Kanae that marks appeared under life-threatening pressure, enhanced strength, and could shorten their bearers’ lives.
• Bai Yue and the others went to the cabin where the Oyakata sisters stayed during Final Selection, while Kanae and the others were delayed by their medical supplies.
• Bai Yue teased Aoi Kanzaki and asked her to massage him, but Kanae noticed his abnormally high temperature and gave him medicine.
• Aoi Kanzaki massaged Bai Yue, eventually stepping on him to work through his tough muscles, and asked whether he could turn off his mark.
• Aoi Kanzaki thanked Bai Yue for saving her, and Kanae offered to help massage him.

Aoi Kanzaki helped Bai Yue bathe and questioned him about his mark, his reported death, and his reincarnation. He demonstrated his regeneration by apparently killing himself, then revived and startled her with a playful lunge.

• Aoi Kanzaki entered the bath to help bandage Bai Yue's injured hands, while Kanae offered to take over and Aoi warned her off.
• Aoi examined the wing markings on Bai Yue's back and asked whether he had really killed half of the Twelve Kizuki and gained wings from his mark.
• Bai Yue told Aoi that he had died and reincarnated into a body he had prepared through regenerative technology.
• Bai Yue broke his own neck in front of Aoi, leaving her panicked when he appeared dead.
• Bai Yue's body moved unnaturally and lunged at Aoi, then licked her face and revealed that he had only been scaring her.

Aoi Kanzaki tried to explain to Kanae that an accidental fall and her later help tending to Bai Yue had not been what Kanae suspected. Just as Aoi blurted out what she had cleaned, she noticed Kanae signaling her to stop and looking behind them.

• Aoi Kanzaki slipped on the wet floor and fell onto Bai Yue, and Kanae walked in on the chaotic scene.
• At dinner, Aoi told Kanae she needed to explain the accident, while Kanae kept recalling what she had seen.
• Aoi remembered that she had helped clean Bai Yue because his injured hands could not touch water.
• Bai Yue greeted the Ubuyashiki sisters, who soon fell asleep together beneath blankets, and Aoi compared their courage to her own.
• Aoi pulled Bai Yue and Kanae aside and explained the accident and her medical assistance, but Kanae’s gentle questioning led Aoi to blurt out what she had wiped.
• Aoi noticed Kanae signaling her to stop and looking behind them.

Aoi Kanzaki returned to Final Selection to face her fear of demons and capture one for Kanae’s experiments. After Bai Yue protected her from the Hand Demon, she fought back and severed one of its arms, but the demon attacked again.

• Aoi Kanzaki reentered Mt. Fujikasane, determined to fight demons despite her fear and bring one back for Kanae’s experiments.
• Aoi Kanzaki dodged a demon with blade-like arms, but the Hand Demon appeared and killed it with a sweeping blow.
• Bai Yue shielded Aoi Kanzaki from the Hand Demon and was impaled by a sword, then urged her to hold it off while he recovered.
• Aoi Kanzaki learned the Hand Demon had been imprisoned on the mountain for years and hated Sakonji Urokodaki and his students.
• Aoi Kanzaki overcame some of her fear, attacked the Hand Demon, and cut off one of its arms before it struck again.

Aoi Kanzaki trusted her instincts and killed the oni, then discovered that Bai Yue’s apparent near-fatal injuries had vanished. Back at the cabin, she found him healthy and bathing, leaving her confused as Shinobu teased her about her feelings for him.

• Bai Yue urged Aoi Kanzaki to trust her instincts as she fought the oni, and she cut off its arms and beheaded it.
• Aoi Kanzaki found Bai Yue badly wounded, gave him emergency treatment, and ran to the cabin to fetch help.
• At the cabin, Aoi Kanzaki learned that Kanae and the others were in the warehouse and saw Bai Yue emerge from the bathroom without a wound.
• Aoi Kanzaki knocked Bai Yue down while checking his chest, and Shinobu and Kanae questioned the scene.
• Bai Yue admitted that teasing Aoi Kanzaki was interesting, and Shinobu warned Aoi that he was harder to kill than Muzan.

At Mt. Fujikasane, Tamayo’s experiments and self-administered medicine caused her blood ability to overwhelm the people around her with delusions. While everyone remained trapped in visions of their deepest wishes, Tamayo’s hallucination led her to believe she had uncovered a way to bring her child back to life.

• Aoi Kanzaki thanked Bai Yue for helping her face her fear, then agreed not to return to the Final Selection after Shinobu explained she had already proved herself.
• Mitsuri Kanroji reported that Tamayo had injected herself with medicine and something had gone wrong, so everyone rushed to the warehouse.
• Shinobu and the others were bewitched by Tamayo’s blood, while Tamayo herself fell under the influence of her uncontrolled ability.
• Bai Yue saw that Nezuko, Kanae, and Aoi Kanzaki were each experiencing delusions of the family life they most desired.
• In her hallucination, Tamayo believed she had learned the secret of Bai Yue’s regeneration and considered using her own cells to create a body for her dead child.

Kanae and Bai Yue dealt with Tamayo’s blood-induced hallucinations after a demon attacked her, but Bai Yue suspected Tamayo had tampered with the medicine she used on him. As Tamayo waited for her plan to work, Shinobu woke and began to realize that her memories of a successful demon-to-human experiment had been a dream.

• Kanae injected Tamayo with anesthetic after Tamayo’s blood caused the group to hallucinate, and Bai Yue helped move everyone into the cabin.
• Tamayo apologized and resumed cleaning, while Bai Yue noticed she might have deliberately destroyed the medicine for external wounds.
• Kanae treated Bai Yue with Tamayo’s replacement medicine, unaware that it contained a stimulant and that Tamayo had released blood to induce hallucinations.
• Tamayo waited to see whether Bai Yue would fall asleep so she could collect what she wanted, but the sleeping drug seemed ineffective.
• Shinobu woke in the cabin and recognized her memories of Tamayo successfully turning a demon into a human as a dream.

Shinobu confessed her feelings for Kanae’s beloved, and Kanae accepted her, while Mitsuri secretly followed Tamayo and discovered her investigating water and injecting an extract into herself. Bai Yue and Shinobu suspected Tamayo’s delusion ability was involved, but they did not explain her plan to Mitsuri.

• Shinobu told Kanae she loved the same person Kanae did and feared coming between them, and Kanae assured her she could share in their happiness.
• Mitsuri woke before dawn, found a note asking her to secretly observe someone, and followed Tamayo toward the bathroom drain.
• Mitsuri watched Tamayo extract something from the wastewater, examine it under a microscope, and inject it into herself before speaking softly to an unseen presence.
• Mitsuri reported what she had seen to Shinobu and Bai Yue, who discussed Tamayo’s lingering delusions and her possible plan.
• Mitsuri asked what Tamayo was trying to do, but Shinobu and Bai Yue left her confused and feeling excluded.

Mitsuri Kanroji accompanied Bai Yue to Swordsmith Village, where his blood transformed a Nichirin Blade into a destructive black-red weapon before it returned to dull steel. Meanwhile, Kanae’s experiment appeared to turn a demon into a corpse, and she worried that Tamayo’s pregnancy would delay the medicine’s development.

• Mitsuri Kanroji left to collect medical instruments from Swordsmith Village, and Bai Yue joined her at the carriage.
• Mitsuri Kanroji brought Bai Yue to meet Tetsu'o Kawahara Chin'tetsu and showed him the ore used to forge Nichirin Blades.
• Bai Yue’s blood heated the ore and transformed an unowned Nichirin Blade into a glowing black-red blade.
• Bai Yue swung the transformed blade, blasting a distant mountainside, and the weapon faded back to dull steel-gray.
• Kanae examined a demon that her medicine had seemingly turned into a lifeless human corpse while Tamayo remained lost in her fantasy.
• Kanae’s younger sister asked whether they would have to wait around ten months for Tamayo to recover.

Kanae and Shinobu tried to find a way to bring Tamayo back to her senses while the Swordsmith Village prepared a special Nichirin greatsword for Bai Yue. Daki discovered the village and approached to attack, interrupting Bai Yue and Mitsuri Kanroji at the hot spring as the villagers went on alert.

• Kanae teased Shinobu about missing Bai Yue, then whispered an embarrassing question to her.
• At the Swordsmith Village, Tetsu'o Kawahara Chin'tetsu decided to forge Bai Yue a blade from high-purity ore, and Bai Yue showed the swordsmiths his double-edged greatsword design.
• Mitsuri Kanroji led Bai Yue to a hot spring, but he carried her back down the mountain after sensing an unwelcome guest nearby.
• Daki, Upper Rank Six, found the Swordsmith Village and headed toward it, hoping to destroy it and earn praise.
• Bai Yue noticed startled birds fleeing from Daki's direction, and the Swordsmith Village entered a state of readiness.

Mitsuri Kanroji confronted Daki, an Upper Rank demon, at the Swordsmith Village and quickly cut her apart. Daki split into two opponents, and Mitsuri’s companion took one while Mitsuri prepared to face the other.

• Mitsuri Kanroji learned that a likely Upper Rank demon had reached the Swordsmith Village, whose people were ready to defend it.
• Daki attacked Mitsuri, who countered her obi and mocked Daki’s insults about her appearance.
• Mitsuri used her Love Breathing forms to cut Daki apart and sever the threads connecting her head to her body.
• A second figure emerged from Daki’s remains and attacked Mitsuri, but her companion struck it away and divided the fight between them.

Mitsuri Kanroji fought Daki and awakened a heart-shaped mark as her strength and perception increased. Bai Yue battled Gyutaro with blood-infused weapons, then prepared to continue fighting hand-to-hand to improve his body's limits before facing Muzan.

• Gyutaro emerged from Daki and shared his power with her, but Mitsuri broke through Daki's enhanced attacks again.
• Mitsuri's growing excitement awakened a heart-shaped mark on her neck, and she beheaded Daki once more.
• Gyutaro struggled against Bai Yue's blood-infused knives and forks, which burned and poisoned him, and recognized Bai Yue as the one who had killed Hantengu.
• Bai Yue used up the weapons and decided to fight Gyutaro hand-to-hand to build his body's strength and extend a future transformation.

Bai Yue used a blood-based breathing technique to poison and weaken Gyutaro, pushing the demon close to death in their fight. As Bai Yue prepared a final strike, a wooden double door appeared behind Gyutaro, and he sensed a powerful presence beyond it.

• Gyutaro attacked Bai Yue with his Blood Demon Arts, but his slashes collapsed and his body began to suffer from an internal poison.
• Bai Yue explained that he had dispersed his blood and qi into the air, poisoning Gyutaro when he inhaled it, and named the method Blood Breathing.
• Gyutaro wounded Bai Yue with a blood scythe, but Bai Yue's blood splashed onto him and further corroded his body.
• Bai Yue struck Gyutaro's abdomen and moved to kill him as Gyutaro's weakened leg snapped.
• A wooden double door appeared behind Gyutaro, and Bai Yue sensed a powerful presence before redirecting his final all-out strike.

Gyutaro and Daki returned to the Infinity Castle after a brutal defeat, where Muzan investigated the blood-red crystals that had harmed Kokushibo and ordered the Twelve Kizuki expanded. At the Swordsmith Village, Bai Yue examined Mitsuri Kanroji and discovered that her mark enhanced catlike traits.

• Kokushibo suffered intense pain after pulling a skeletal hand from his head, and Doma noticed blood-red crystals in the damaged flesh of Kokushibo, Gyutaro, and Daki.
• Gyutaro explained that the siblings had encountered the strange crystals while attacking the Swordsmith Village, and Doma questioned whether Kokushibo had truly killed their enemy.
• Muzan arrived, crushed a Lower Rank demon’s head, spared Gyutaro and Daki, and made the demon eat the crystals so he could examine their effects.
• Muzan concluded that the crystals disrupted demon blood and regeneration, worried that Tamayo was experimenting with his blood, and decided the Twelve Kizuki needed more members.
• As the Swordsmith Village prepared to evacuate at daybreak, Bai Yue examined Mitsuri Kanroji and found that her mark enhanced catlike physical traits, subtly changing her hair to resemble ears.