Chapter Summaries

Enmu used his Blood Demon Art to enter the sleeping Demon Slayers’ dreams aboard the train and learned Su Chen was among them. Believing Su Chen had fallen asleep and was now within his power, Enmu prepared to trap him in a dream.

• Su Chen found Kyojuro deeply asleep from exhaustion, placed his Nichirin Blade beside him, and entered a dream.
• Enmu met the humans who had helped him put the passengers to sleep and granted one of them a dream, prompting the others to beg for the same.
• Enmu recalled Muzan’s orders to find the Blue Spider Lily and Su Chen, with death as the consequence for failing to locate Su Chen.
• A woman told Enmu that she had seen Su Chen with the Demon Slayer Corps, and Enmu cross-checked the group’s accounts.
• Enmu realized Su Chen was aboard the train, celebrated, and asked whether the Demon Slayer had fallen asleep.

Enmu sent four humans to infiltrate the sleeping Demon Slayers’ dreams and target their Dream Cores, while he entered Su Chen’s dream. After seeing Su Chen treat patients and train at the Butterfly Mansion, Enmu guessed that Shinobu Kocho was his weakness and prepared to use her to distract him.

• Enmu instructed four humans to use Dream Tethers to enter the Demon Slayers’ dreams and destroy their Dream Cores, warning them to stay away from Su Chen.
• On the train, the four humans settled beside different Demon Slayers while Su Chen appeared to sleep peacefully.
• Enmu entered Su Chen’s dream and found him treating patients at the Butterfly Mansion with Shinobu Kocho assisting him.
• Enmu followed Su Chen as he trained with his Nichirin Blade and recognized that his strength and speed rivaled an Upper Rank demon’s.
• Enmu decided Shinobu Kocho was Su Chen’s weakness and planned to make her appear more often to distract him while he destroyed Su Chen’s Dream Core.

Enmu used a dream built from Su Chen’s thoughts to tempt him with a version of Shinobu Kocho in black stockings, but Su Chen escaped her embrace with Dragon Breathing techniques. Enmu then reached the edge of Su Chen’s dream and entered a vast Sky City, where his spiritual core seemed to lie.

• Enmu recreated Shinobu Kocho in Su Chen’s dream wearing black stockings, and Su Chen struggled to believe the scene was a dream.
• Shinobu Kocho approached Su Chen with tea, embraced him, and asked whether he liked her stockings.
• Su Chen activated Transparent World and used Dragon Breathing’s Fifth and Ninth Forms to slip free without harming Shinobu Kocho.
• Enmu lost track of Su Chen’s spiritual core, then slashed away the dream scenery and discovered a Sky City.
• Enmu entered the Sky City and found it vast and surrounded by clouds as a fierce gale rose.

Enmu entered Su Chen’s Dream Core and found a vast mental palace guarded by a thunder dragon. Su Chen awakened his mental core and gained a mental space, leaving Enmu terrified and demanding to know what kind of monster he was.

• Enmu walked through a strange, wind-swept corridor and reached a magnificent palace inside Su Chen’s Dream Core.
• Enmu examined the palace’s pillars and felt terror at the dragon carved around the right pillar.
• A thunder dragon emerged among dark clouds and lightning as Su Chen appeared at the far end of the path.
• Su Chen meditated, entered a deeper layer of the dream, and awakened his mental core, gaining a mental space.
• Su Chen realized Enmu had been intercepted by the thunder dragon, while Enmu panicked at the scale of Su Chen’s Dream Core.

Su Chen killed Enmu inside the Memory Palace and learned that the place could store memories and strengthen his Reversion State. After waking, he found Tanjiro and Nezuko had defeated nearby demons while Kyojuro, Zenitsu, and Inosuke still slept, and he told Tanjiro he had defeated the powerful demon inside his dream.

• Enmu tried to escape Su Chen’s dream, but Su Chen’s control of the Memory Palace trapped it and the Thunder Dragon devoured it.
• Su Chen explored the intact Memory Palace, discovering that it stored memories and served as his spiritual core, which he could enter through meditation.
• Su Chen woke and found Tanjiro and Nezuko had killed the nearby demons, while Kyojuro, Zenitsu, and Inosuke remained asleep.
• Tanjiro told Su Chen he had sensed the powerful demon responsible for the dreams and warned that the train’s passengers were in danger.
• Su Chen reassured Tanjiro that he had already dealt with the demon inside his dream, leaving Tanjiro and Nezuko puzzled.

After Su Chen explained how he killed Enmu inside his dream, Tanjiro asked to become his Tsuguko, and Su Chen agreed on the condition that Zenitsu come along. Su Chen urged Tanjiro and the others to rest before an impending battle, while Nezuko chose to stay outside her box.

• Su Chen told Tanjiro and Nezuko Kamado how Enmu entered his dream and died there.
• Tanjiro admired Su Chen's abilities and asked to become his Tsuguko.
• Su Chen agreed to take Tanjiro as his Tsuguko if he brought Zenitsu along, hoping to learn Thunder Breathing.
• Su Chen stopped Tanjiro from waking Zenitsu and told him to rest because a major battle was coming.
• Tanjiro let Nezuko Kamado sleep beside him instead of returning to her box, and she walked toward Su Chen.

Su Chen checked the train after leaving a clone with Nezuko Kamado and found the conductor asleep at the controls. He questioned the conductor, knocked him unconscious, and took over driving while Tanjiro was told to find another driver.

• Nezuko Kamado clung to Su Chen’s clone while Tanjiro meditated and Zenitsu slept.
• Su Chen went to the front of the train and found the conductor asleep while the train continued along its route.
• The conductor admitted he had worked with Enmu because he wanted to see his dead wife and son.
• Su Chen told the conductor that the passengers should not have to die for his goal, then knocked him unconscious.
• Su Chen used his clone to tell Tanjiro to find another driver and activated Transparent World as he took the controls.

Su Chen regained control of the runaway train, while Tanjiro and Kyojuro woke and realized he was missing. Akaza attacked the train, and Kyojuro drove the Upper Rank Three out of the carriage to protect the passengers.

• Su Chen reverted to the train driver's driving state, learned the skill, and brought the unstable train back onto the tracks.
• Tanjiro and Kyojuro woke, discovered Su Chen was gone, and decided to search for him as Nezuko headed toward the front of the train.
• Akaza tore a hole in the train and attacked Tanjiro, but Kyojuro blocked his blow with Flame Breathing, Second Form: Rising Scorching Sun.
• Akaza recognized Tanjiro's flame earrings and struck again, but Kyojuro intercepted him with Blazing Breathing, First Form: Unknown Flame.
• Kyojuro pushed Akaza through the hole and leapt out of the train with him to keep the fight away from the passengers.

Tanjiro charged from the train while entrusting Zenitsu and Inosuke with protecting the passengers, and Kyojuro fought Akaza using Blazing Breathing. Inspired by Su Chen, Kyojuro awakened a flame pattern on his neck, leaving Akaza stunned by the appearance of a Demon Slayer Mark.

• Tanjiro rushed out of the train and told Inosuke to protect the passengers alongside Zenitsu.
• Kyojuro confronted Akaza and attacked with Blazing Breathing, Fifth Form: Blazing Tiger.
• Akaza deployed his Compass Needle and struck with Air Type, but Kyojuro's flames overwhelmed the shock waves.
• Akaza praised Kyojuro's strength, asked him to reveal who had taught him Blazing Breathing, and urged him to become a demon; Kyojuro refused.
• Remembering Su Chen's resolve, Kyojuro awakened a blazing pattern on his neck, and Akaza recognized markings like a demon's.

Akaza tried to persuade Kyojuro to become a demon, but Kyojuro refused and fought him after awakening his Demon Slayer Mark. When Akaza's attack threatened Tanjiro, Su Chen arrived and stopped it, leaving the three Demon Slayers facing a serious Akaza together.

• Akaza praised Kyojuro's Demon Slayer Mark and urged him to become a demon, but Kyojuro refused and continued fighting.
• Tanjiro arrived and declared that Kyojuro would never become a demon, prompting Akaza to attack him and Kyojuro with a wide-ranging technique.
• Su Chen arrived and used Dragon Breathing: Sixth Form-Twisting Tongue of Flame to burn away Akaza's shock wave before it could hit Tanjiro.
• Akaza recognized Su Chen and challenged him and Kyojuro to fight together.
• Kyojuro warned Su Chen about Akaza's powerful, wide-reaching attacks, and Su Chen said flame techniques could counter them.

Su Chen faced Akaza alone while Kyojuro evacuated the Demon Slayers and passengers, but Inosuke accidentally returned the train with everyone aboard. Su Chen used the Transparent World to evade Akaza’s attacks and moved behind him, while Kyojuro waited for a chance to strike.

• Su Chen told Kyojuro to protect the others and chose to fight Akaza alone.
• Inosuke drove the train back to the group, and Nezuko Kamado and the sleeping Zenitsu rushed out to join Su Chen.
• Kyojuro directed the Demon Slayer Corps swordsmen to retreat and protect the passengers as Akaza challenged Su Chen to a one-on-one fight.
• Akaza attacked with Destructive Death: Leg Type: Flowing Flashing Lights, but Su Chen activated the Transparent World and Reversion State, making Akaza’s Compass Needle lose track of him.
• Su Chen used Dragon Breathing, Second Form: Scorching Breath to counter Akaza’s shock waves, while Kyojuro, Tanjiro, the trio, and Nezuko protected the crowd from the remaining attacks.
• Su Chen moved behind Akaza as Kyojuro watched for an opening to use Flame Breathing: Purgatory.

Su Chen overwhelmed Akaza in a rapid battle, using the Transparent World to evade and destroy Akaza’s strongest attacks. Akaza realized he could neither defeat nor escape Su Chen, then tried to bargain for another chance to fight in a hundred years.

• Su Chen repeatedly attacked Akaza so quickly that Akaza’s Compass Needle could no longer sense his presence, leading Akaza to suspect Su Chen had reached the supreme domain.
• Su Chen pinned Akaza down with swift strikes while Akaza used Flying Wandering Star: Thousand Wheels and scattered attacks to search for him.
• Tanjiro, Inosuke, and Kyojuro watched in awe as Su Chen and Akaza fought at a speed most of them could barely follow.
• Akaza unleashed Blue Silver Chaotic Afterglow, but Su Chen dodged its projectiles and cut down hundreds of them with his flaming blade.
• Akaza asked who Su Chen was, and Su Chen identified himself as the Dragon Hashira before Akaza pleaded to be spared so they could fight again in a hundred years.

Su Chen learned Akaza’s Destructive Death movements during their fight and used them to decapitate the fleeing Upper Rank demon. The passengers and Demon Slayers witnessed Akaza’s defeat as Su Chen considered how his strength might fare against Doma.

• Akaza tried to persuade Su Chen to become a demon, then fled when Su Chen raised his Nichirin Blade.
• Su Chen used the Transparent World to predict Akaza’s moves, mastered Destructive Death, and cut off Akaza’s head.
• Tanjiro, Inosuke, the Flame Hashira, and the passengers watched in astonishment as Akaza fell, while a reporter photographed Su Chen.
• Su Chen sheathed his sword and judged that he could defeat Upper Rank Three, though he was uncertain about facing Doma.
• Su Chen reviewed the Destructive Death techniques he had learned from Akaza.

After defeating Akaza and copying his techniques, Su Chen boarded the train with the Demon Slayer Corps and checked on Kyojuro. The passengers mobbed him with praise and attention, leaving him struggling to reach the front of the carriage to drive the train.

• Su Chen copied Akaza's demonstrated techniques, thanked Akaza's corpse, and left for the train.
• Su Chen examined Kyojuro and found that he needed only a few days of rest to recover.
• Tanjiro, Inosuke, and Nezuko praised Su Chen before he tried to head to the front of the carriage.
• Passengers crowded around Su Chen for interviews, autographs, and attention, while Zenitsu woke and saw them fawning over him.
• Kyojuro tried to help Su Chen, but the passengers dismissed him and mocked Inosuke until Tanjiro calmed everyone down.
• Su Chen told the remaining girls he needed to drive the train, but they misunderstood him and continued to crowd around.

Su Chen returned the Mugen Train toward its terminal after defeating the demons, while the survivors reached the Butterfly Mansion and learned how many Upper Rank demons he had slain. The chapter ended with Su Chen riding alone in the empty train as his clone drove it home.

• Su Chen ran along the train's wall and ceiling, then sent the Mugen Train toward its true destination as passengers celebrated the demons' defeat.
• Zenitsu wondered why Su Chen's lightning felt familiar, and the train eventually reached its terminal.
• At the Butterfly Mansion, Tanjiro told Kanao Tsuyuri and the others that Su Chen had slain another Upper Rank demon aboard the train.
• Kyojuro Rengoku confirmed Su Chen's account and said Su Chen's strength had saved him from fighting Akaza.
• Kanao Tsuyuri smiled with relief and looked forward to Su Chen's return.
• Su Chen rode inside the empty Mugen Train while his clone drove it across the land.

Su Chen met Akaza aboard the train and listened as Akaza recalled his human life as Hakuji. Akaza’s memories reached the start of his relationship with Koyuki, but his account was still unfinished.

• Su Chen waited aboard the train and welcomed Akaza when he arrived, knowing Akaza was coming.
• Akaza told Su Chen that he had recovered his memories from when he was human.
• Akaza recalled stealing to buy medicine for his ill father and learning martial arts at Keizo’s dojo.
• Akaza described meeting Koyuki, protecting her from the Kendo Dojo’s master’s son, and agreeing to marry her.
• Akaza asked Su Chen if he had ever dated a girl, then continued by recalling taking Koyuki to see fireworks.

Akaza told Su Chen how Hakuji had lost Koyuki and his master, and Su Chen revealed that Akaza was free of Muzan’s curse and offered him a chance to atone. Akaza agreed to help locate Muzan, kill Doma, and drive out the demons, though Su Chen warned him not to act alone.

• Akaza recounted how the kendo dojo poisoned the well at the Soryu dojo, killing Koyuki and his master, and how he slaughtered the dojo in revenge.
• Su Chen listened to Akaza’s story and told him he would not kill him.
• Akaza discovered that Muzan’s curse had vanished, and the falling snow reminded him of Koyuki.
• Su Chen told Akaza that he had to atone by providing places where Muzan appeared, luring Doma out, and cooperating with the Demon Slayer Corps to drive out the demons.
• Akaza eagerly agreed, and Su Chen instructed him to follow a plan and not act alone.

Su Chen and Akaza agreed to work together against Doma, with Su Chen refusing to let Akaza deliver the final blow. When Akaza’s hunger became unbearable, Su Chen gave him some of his blood, only to discover that his Marechi blood made Akaza drunk and might test his resolve not to eat people.

• Su Chen told Akaza he was speaking to Hakuji, and Akaza agreed to cooperate with him.
• Akaza asked to kill Doma himself, but Su Chen refused and said he would finish Doma off.
• Akaza shared information about Doma and Muzan before hunger overwhelmed him.
• Su Chen told Akaza to eat animals and seek help from Tamayo, then used the Transparent World to transfuse a small amount of blood into his stomach.
• Su Chen realized his Marechi blood had made Akaza drunk and could intensify his hunger.

After Akaza stopped receiving marechi blood, he thanked Su Chen and promised to stop eating people and seek out Tamayo. Su Chen absorbed changes from Akaza’s blood, gained a deeper understanding of Destructive Death, and left Akaza stunned by copying his techniques and developing new ones.

• Akaza thanked Su Chen, promised to stop eating people, and agreed to find Tamayo; Su Chen warned him not to eat people and suggested he eat wild game on the road.
• Akaza asked Su Chen to call him Hakuji, but changed his mind when Su Chen reminded him that Koyuki would be left a widow.
• After Su Chen stopped supplying blood, the blood he had absorbed from Akaza began changing his body and strengthening his demon power and Blood Demon Art mastery.
• Su Chen unconsciously unleashed Destructive Death techniques, including Blue Silver Chaotic Afterglow, leaving Akaza convinced Su Chen had learned them from him.
• Su Chen’s insights combined Destructive Death with Breathing Styles, producing the Destructive Asura sword style and the techniques Destructive Death: Compass Needle and Perception Compass Needle.

Su Chen evolved Destructive Death into the Destructive Asura Sword Style and improved his Perception Compass Needle. After ordering Akaza to seek Tamayo’s cooperation, Su Chen began searching his memories for Doma’s Mimicry in hopes of learning the Blood Demon Art himself.

• Su Chen awakened to his upgraded Perception Compass Needle and Destructive Asura Sword Style after receiving Akaza’s blood, and he felt his body growing stronger.
• Su Chen stopped Akaza from jumping off the moving train and instructed him to drive it back to the station, then find Tamayo and seek her cooperation.
• Akaza admitted that he had never learned Mimicry, so Su Chen abandoned the plan for him to imitate the encounter that had led Tanjiro to Tamayo.
• Su Chen had Akaza drive toward the Butterfly Mansion while he activated the Transparent World, Reversion State, and Memory Palace to search for Doma’s Mimicry and consider learning it himself.