Chapter Summaries

Lin Yoriichi, a cosplayer transported into the Demon Slayer world, discovered that his Yoriichi Tsugikuni costume and sword had become real as Kie Kamado demanded he leave her home. He opened the door and came face-to-face with Muzan Kibutsuji, who mistook him for the Yoriichi Tsugikuni who had once defeated him.

• Lin Yoriichi tried to reassure Kie Kamado that he was harmless and would leave her house.
• Lin Yoriichi discovered his cosplay sword was real and saw that his Yoriichi Tsugikuni cosplay had granted him basic abilities at 10% fidelity.
• Kie Kamado ordered Lin Yoriichi to leave, and he cautiously backed toward the door.
• Muzan Kibutsuji approached the Kamado home, planning to experiment on its occupants and kill the children first.
• Lin Yoriichi opened the door, and Muzan Kibutsuji saw his resemblance to Yoriichi Tsugikuni and froze in terror.

Lin Yoriichi encountered Muzan Kibutsuji on the night the Kamado Family was slaughtered and used Muzan’s fear of Yoriichi Tsugikuni to make him believe the legendary swordsman had returned. After striking an old wound, Lin confronted Muzan with three questions about his smile and his view of life.

• Lin Yoriichi recognized Muzan Kibutsuji and realized Muzan mistook him for Yoriichi Tsugikuni.
• Lin told Muzan he had returned from hell, then drew his blade and displayed Sun Breathing, the Demon Slayer Mark, and the Transparent World.
• Muzan was paralyzed by fear as Lin charged and saw his organs and the wounds Yoriichi had left behind.
• Lin struck Muzan directly on one of those old wounds, making Muzan believe Yoriichi had returned.
• Lin asked Muzan what he had found funny, what had amused him, and what he took life for.

Lin Yoriichi drove Muzan Kibutsuji into a panicked escape, then helped the unconscious Kamado family while waiting for help. Giyu Tomioka reached the house and tried to reassure its occupants with an awkward announcement.

• Lin Yoriichi struck Muzan Kibutsuji, whose scream interrupted the attack and gave him time to split into chunks of flesh and flee.
• Lin Yoriichi watched for the fleeing pieces until they vanished, then found the Kamado family unconscious and helped Kie Kamado beside them.
• Lin Yoriichi shut the door against the cold and waited for Giyu Tomioka to arrive and summon assistance.
• Giyu Tomioka found blood and wriggling scraps of flesh outside the house, then knocked and told the occupants he knew they were home.

After Lin Yoriichi helped protect the Kamado Family from Muzan Kibutsuji, Momoki Haruko and Giyu Tomioka arranged to move them somewhere safe. Headquarters then ordered Giyu to bring Lin Yoriichi back with him.

• Giyu Tomioka questioned Lin Yoriichi about what had happened, and Momoki Haruko arrived to handle the aftermath.
• Lin Yoriichi told Momoki Haruko that he had scared off a demon and protected the family, and she checked the unconscious Kamado Family.
• Momoki Haruko said the family was unharmed but should be moved to a Wisteria Family House, and Giyu Tomioka sent a report through his Kasugai Crow.
• Lin Yoriichi mentioned another family member would return in the morning, and Momoki Haruko said someone would find and bring him to safety.
• A Kasugai Crow announced that Headquarters had ordered Giyu Tomioka to invite Lin Yoriichi back to Headquarters.

Muzan Kibutsuji returned to the Infinity Castle badly wounded, changed his appearance, and vented his anger on Nakime. After summoning Kokushibo, he recognized that his wounds matched those inflicted by Yoriichi Tsugikuni and ordered Kokushibo to investigate Yoriichi’s grave.

• Nakime brought Muzan Kibutsuji into the Infinity Castle, where he reassembled himself after escaping in pieces.
• Muzan Kibutsuji changed into a woman, devoured most of Nakime’s body, and took her kimono.
• Muzan Kibutsuji ordered Nakime to summon Kokushibo.
• Kokushibo arrived and recognized the wounds across Muzan Kibutsuji’s body as matching Yoriichi Tsugikuni’s attacks.
• Muzan Kibutsuji ordered Kokushibo to find Yoriichi Tsugikuni’s grave and check whether his remains were still there.

Lin Yoriichi teased Giyu Tomioka about being disliked, prompting Giyu to question how others saw him as they traveled toward Headquarters. When a Kasugai Crow reported Murata was in danger, Giyu rushed to help and killed the demon that insulted him.

• Giyu Tomioka explained that the Demon Slayer Corps used telegrams as well as Kasugai Crows to relay messages.
• Lin Yoriichi asked Giyu about his strained relationships and his habit of saying he was different from others, leaving Giyu silent for the rest of their journey.
• As night fell, Giyu explained that demon slayers traveled by day but responded immediately to crow messages or signs of demons.
• A Kasugai Crow reported that Kinoe-ranked swordsman Murata had encountered a demon, and Giyu and Lin Yoriichi hurried to assist him.
• After the Mouth-Splitting Demon insulted Giyu, Giyu used Water Breathing, Seventh Form: Drop Ripple Thrust to pierce its neck and declared, "Nobody hates me!"

Giyu Tomioka killed a slit-mouthed demon, but Murata warned that a sharp-clawed demon was still nearby. The demon attacked the group, and Lin Yoriichi drew his sword and activated his full strength after the demon targeted him.

• Giyu Tomioka beheaded the slit-mouthed demon, and Murata confirmed he was mostly unharmed.
• Murata warned Giyu Tomioka and Lin Yoriichi that a sharp-clawed demon had been chasing him.
• The sharp-clawed demon smashed through a wooden wall and boasted about eating Demon Slayers.
• The demon used his barbed tongue to attack Murata and Giyu Tomioka, but Giyu cut off part of it.
• The demon sent his tongue after Giyu Tomioka, trapped Murata with the severed section, and charged at Lin Yoriichi.
• Lin Yoriichi drew his dark red sword and activated the Transparent World, Sun Breathing, and his Demon Slayer Mark.

Lin Yoriichi killed the demon with Sun Breathing, alarming Muzan Kibutsuji, who recognized the sword’s wounds and demanded that Nakime summon Kokushibo. The next morning, Lin Yoriichi, Giyu Tomioka, and Murata headed to headquarters, while Lin Yoriichi considered hunting demons to increase his replication percentage.

• Lin Yoriichi beheaded the demon with Sun Breathing’s Eleventh Form as Giyu Tomioka and Murata watched.
• Muzan Kibutsuji reacted to the demon’s death, recoiled from the sight of Lin Yoriichi’s sword, and shouted at Nakime to summon Kokushibo.
• After resting at a Wisteria House, Lin Yoriichi, Giyu Tomioka, and Murata set out for headquarters and the Butterfly Mansion.
• Lin Yoriichi discovered that killing the demon had raised his replication percentage to 20% and considered hunting more demons.
• Giyu Tomioka explained why Murata needed to report to Oyakata-sama and receive a precautionary examination, then announced that headquarters was close.

Lin Yoriichi arrived at the Ubuyashiki mansion with Giyu Tomioka and Murata and was introduced to the gathered Hashira. The Master arrived as the Hashira began judging Lin Yoriichi, whom Giyu had reported as strong.

• Giyu Tomioka explained that the mansion’s wisteria bloomed year-round and protected it from demons, then Hinaki Ubuyashiki welcomed the group inside.
• Hinaki Ubuyashiki introduced Lin Yoriichi as a “swordsman for fun,” drawing the attention of the gathered Hashira.
• Tengen Uzui and Shinobu Kocho greeted Lin Yoriichi, while Sanemi Shinazugawa and Obanai Iguro questioned his qualifications and Giyu Tomioka’s assessment of him.
• Gyomei Himejima told Sanemi Shinazugawa and Obanai Iguro to let Oyakata-sama judge, as Lin Yoriichi recognized the other Hashira present.
• Kyojuro Rengoku and Mitsuri Kanroji greeted Lin Yoriichi, then the scarred Master arrived before the courtyard.

Kagaya Ubuyashiki introduced Lin Yoriichi to the Hashira, and Sanemi Shinazugawa questioned whether he belonged in the Demon Slayer Corps. After Murata described Yoriichi’s strength, Kagaya revealed that Yoriichi had also faced Muzan Kibutsuji and protected a family, leaving the Hashira stunned.

• Sanemi Shinazugawa asked why Kagaya Ubuyashiki had summoned the unknown Lin Yoriichi, while Gyomei Himejima said the Hashira needed to understand his abilities.
• Kagaya asked Giyu Tomioka to describe Yoriichi’s strength, but Giyu only said that he was very strong.
• Murata reported that Yoriichi had instantly killed a demon with a Blood Demon Art after it ambushed him.
• Gyomei Himejima judged Yoriichi strong enough to join the Demon Slayer Corps, and Sanemi stopped questioning his recruitment.
• Kagaya revealed that Yoriichi had encountered Muzan Kibutsuji at Mount Kumotori, escaped unharmed, and protected a family, shocking the Hashira.

Lin Yoriichi told the Hashira that he had encountered Muzan Kibutsuji, giving the Demon Slayer Corps new hope. In private, Kagaya Ubuyashiki recognized Lin Yoriichi’s connection to Yoriichi Tsugikuni and offered his support, while Lin asked for help finding Tsugikuni’s grave and old Nichirin Sword.

• Giyu Tomioka and Kyojuro Rengoku reacted with shock and praise after learning Lin Yoriichi had survived an encounter with Muzan Kibutsuji.
• Tengen Uzui demanded details about Muzan Kibutsuji, while Gyomei Himejima restrained him and the Hashira felt renewed hope.
• Kagaya Ubuyashiki invited Lin Yoriichi to speak privately and revealed that he knew of Yoriichi Tsugikuni from an old portrait and records.
• Kagaya Ubuyashiki said he would trust Lin Yoriichi and asked how he could help end Muzan Kibutsuji in their generation.
• Lin Yoriichi asked Kagaya Ubuyashiki to help him find Yoriichi Tsugikuni’s grave and recover his old Nichirin Sword from the Swordsmith Village.
• Kagaya Ubuyashiki agreed to help with the Swordsmith Village and suggested Lin Yoriichi might find someone in Asakusa.

Lin Yoriichi accepted a special mission from Kagaya Ubuyashiki to visit Miss Tamayo in Asakusa, with Kyojuro Rengoku assigned to accompany him. As Sanemi Shinazugawa volunteered to join them, the mission’s details remained undisclosed.

• Kagaya Ubuyashiki told Lin Yoriichi to visit Miss Tamayo in Asakusa and promised to arrange their meeting and provide travel money.
• Kagaya Ubuyashiki arranged for Kyojuro Rengoku and Kakushi to accompany and support Lin Yoriichi on the journey.
• Kagaya Ubuyashiki told Lin Yoriichi that the Kamado family was safe at the Butterfly Mansion and that Mrs. Kamado wanted to thank him.
• Kagaya Ubuyashiki ordered Giyu Tomioka and Murata to keep patrolling the area where demons had gathered, and both accepted.
• Kagaya Ubuyashiki assigned Lin Yoriichi a special mission with Kyojuro Rengoku, and Sanemi Shinazugawa asked to join them.

Lin Yoriichi demonstrated his skill by effortlessly defeating Sanemi Shinazugawa in a barehanded exchange, convincing the Hashira of his ability. After Sanemi apologized, Kyojuro Rengoku urged the group to leave for Asakusa.

• Sanemi Shinazugawa agreed to join Lin Yoriichi and Kyojuro Rengoku, but questioned whether he should follow Lin Yoriichi's orders.
• Lin Yoriichi invited Sanemi Shinazugawa to test his strength, and Gyomei Himejima warned Sanemi against fighting inside the Corps.
• Sanemi Shinazugawa attacked Lin Yoriichi with an elbow strike, but Lin dodged, tripped him, and pushed him to the ground in one exchange.
• Sanemi Shinazugawa realized Lin Yoriichi had read his movements, apologized to him at Kagaya Ubuyashiki's request, and Lin accepted.
• Kyojuro Rengoku praised both fighters and called for the group to set off for Asakusa.

Lin Yoriichi and the Hashira investigated reports of strange fevers in Tokyo as Lower Rank Three Byōyō spread fleshly spore sacs through the city. Byōyō attacked Momoki Haruko, but Yoriichi rescued her and prepared to confront him.

• At a Tokyo ramen stall, Lin Yoriichi, Kyojuro Rengoku, and Sanemi Shinazugawa overheard doctors discussing unexplained fevers and comas.
• Byōyō spread spore sacs in an alley before receiving Muzan's order to search for the red-haired man with sun-design hanafuda earrings.
• Momoki Haruko struggled with her uniform alterations while carrying out logistics in Tokyo.
• When Byōyō's sacs began swelling, Lin Yoriichi grabbed Haruko and sent her to safety, then ordered Sanemi and Kyojuro to retreat.
• Byōyō released a cloud of dark red spores, and Kyojuro identified it as a Blood Demon Art as Yoriichi recognized the demon as Lower Rank Three.

Lin Yoriichi, Kyojuro Rengoku, and Sanemi Shinazugawa pursued Lower Rank Three Byōyō, who fled after Muzan ordered him to kill Lin. Byōyō attacked Lin with his Blood Demon Art, then called for Kamanué after Lin shattered the attack.

• Lin Yoriichi told Kyojuro Rengoku and Sanemi Shinazugawa to move against Byōyō, who immediately ran away in fear of the two Hashira.
• Byōyō contacted his lord through his blood, but received only an order to kill Lin Yoriichi and decided to flee instead.
• Kyojuro Rengoku and Sanemi Shinazugawa accelerated after Byōyō, who used Sick Spore Poison to slow their pursuit.
• Byōyō turned back and launched Cross Scythe at Lin Yoriichi, hoping to injure him and stall the Hashira.
• Lin Yoriichi shattered the blood blade with one slash, and Byōyō called for Kamanué to come out.

Lin Yoriichi, Sanemi Shinazugawa, and Kyojuro Rengoku killed Lower Rank Six Kamanué with a coordinated attack while continuing to chase Byōyō. Byōyō sensed Kamanué’s death, then became caught in the strange patterns created by a Blood Demon Art.

• Byōyō encountered Kamanué, who had eaten a human with rare blood, and continued fleeing as he hoped the Demon Slayer Corps would attack Kamanué instead.
• Sanemi Shinazugawa wounded Kamanué with Wind Breathing and doubled back to pursue Byōyō.
• Kyojuro Rengoku slashed Kamanué’s neck with Flame Breathing, then released his sword and doubled back when Kamanué grabbed it.
• Lin Yoriichi pierced and decapitated Kamanué with Sun Breathing, caught Kyojuro Rengoku’s sword, and resumed the pursuit.
• Byōyō sensed Kamanué’s death as the three continued after him, then smelled a fragrance and saw strange patterns appear before his eyes.

Lin Yoriichi met Miss Tamayo in Asakusa after killing Byōyō, and she recognized his resemblance to Yoriichi Tsugikuni. Tamayo brought him to her hidden home and asked whether he really was Yoriichi.

• Byōyō’s floral Blood Demon Art distracted Lin Yoriichi, but Lin Yoriichi held his breath and beheaded him with Sun Breathing, Second Form: Clear Blue Sky.
• Lin Yoriichi approached Miss Tamayo, whose appearance reminded her of Yoriichi Tsugikuni and their past encounter with Muzan Kibutsuji.
• Miss Tamayo invited Lin Yoriichi to her home, while Yushiro protested and Sanemi Shinazugawa and Kyojuro Rengoku remained wary.
• Lin Yoriichi asked Sanemi Shinazugawa and Kyojuro Rengoku to wait, and Miss Tamayo sent Yushiro to collect the blood of the two dead members of the Twelve Kizuki.
• Miss Tamayo led Lin Yoriichi through a hidden entrance to her mansion and asked whether he was really Yoriichi.

Lin Yoriichi learned from Miss Tamayo that she had buried and tended Yoriichi Tsugikuni’s grave for centuries, and she gave him its location. Their conversation increased his portrayal accuracy and left him wondering whether understanding Yoriichi more deeply would improve it further.

• Lin Yoriichi asked Miss Tamayo where Yoriichi Tsugikuni was buried, and she confirmed that she knew.
• Miss Tamayo explained that she had met Yoriichi Tsugikuni after he spared her and had kept in contact with him while researching ways to defeat Muzan Kibutsuji.
• Miss Tamayo recounted secretly witnessing Kokushibo leave Yoriichi Tsugikuni’s body behind, then gathering the remains and building a grave.
• Miss Tamayo said she had tended Yoriichi Tsugikuni’s grave for hundreds of years and wrote down its location for Lin Yoriichi.
• Lin Yoriichi noticed his portrayal accuracy had risen from 30% to 32% and wondered whether understanding Yoriichi Tsugikuni had caused the increase.

Lin Yoriichi gave Miss Tamayo a way to collect demon blood and discussed the risks of Demon Slayer Marks, then Murata and Giyu Tomioka encountered a Lower Rank Six demon in a strange mansion. The demon found itself facing three Hashira when Sanemi Shinazugawa and Kyojuro Rengoku arrived.

• Miss Tamayo introduced Chachamaru and gave Lin Yoriichi a blood-collecting knife so he could send demon samples to her.
• Lin Yoriichi explained how Demon Slayer Marks spread among swordsmen and warned that those awakened later in life reportedly died before turning twenty-five.
• Miss Tamayo drew Lin Yoriichi's blood for research and asked again whether anything was wrong with the address she had written.
• Murata became separated from Giyu Tomioka inside a strange mansion and was struck by a horned demon after his blade lodged in its arm.
• Murata saw that Giyu Tomioka faced a demon bearing the mark of Lower Rank Six, which intended to eat him and grow stronger.
• Sanemi Shinazugawa burst through the wall, and Kyojuro Rengoku arrived soon after, leaving the demon shocked to face three Hashira.

Lin Yoriichi killed Kyogai and two other demons in three swift attacks, then discussed his actions with the Hashira. Giyu Tomioka tried to share Yoriichi’s advice, but ended by insulting Sanemi Shinazugawa.

• Lin Yoriichi beheaded Kyogai, killed a tall demon, and struck down another demon with three attacks.
• Lin Yoriichi found that killing the demons had increased his recreation progress by only 6%.
• Kyojuro Rengoku praised Lin Yoriichi’s attacks, while Sanemi Shinazugawa challenged him for not giving the others a chance to help.
• Giyu Tomioka explained that Lin Yoriichi had advised him to keep honing himself instead of making discouraging remarks about his strength.
• Giyu Tomioka told Sanemi Shinazugawa, “If you suck, practice more!”