Arc 1The Swordmaster’s Voyage

Bai Yu left Windmill Village to pursue swordsmanship and quickly gained allies and enemies while his skill and reputation grew. After defeating Koshiro and learning iron-cutting intent, he confronted Treasure at the docks, where the pirate challenged him with layered chains.

  • Bai Yu defeated Ace in a duel, escaped Garp’s attempt to stop Ace’s departure, and agreed to join the Marines to protect his younger brothers.
  • Bai Yu learned all Three Types of Haki, announced his plan to leave Windmill Village, and sailed alone toward Marine Headquarters.
  • Bai Yu rescued Zoro from Black Axe’s crew, defeated the pirates, and recruited Nami and Carina after discovering Demon Sword Murasame.
  • Bai Yu resisted Murasame’s malice and cut through the sea with the sword while Treasure pursued him and the sword.
  • Bai Yu challenged Koshiro at Isshin Dojo, won their duel, and used a Talisman of Insight to master iron-cutting intent.
  • Bai Yu rushed to the docks after sensing Carina was in danger and killed Sec P with his flying wooden sword.
  • Bai Yu defeated Treasure’s attack and wrecked his ship, then faced Treasure as the pirate wrapped himself in three layers of chains.
Chapters 1–25 Vol. 1 Read

Ch. 1The system that took fourteen years to unlock

Bai Yu waited fourteen years for his system to unlock while Ace challenged him to a fight at Makino’s tavern. The Strongest Template System finally activated just as Bai Yu prepared to accept Ace’s challenge, leaving him to discover what it could do.

  • Bai Yu drank at Makino’s tavern while waiting for his system to finish unlocking, and Makino asked why he was not seeing Ace off.
  • Luffy rushed into the tavern and announced that Ace had come to challenge Bai Yu for the title of big brother.
  • Ace confronted Bai Yu and said he would defeat him using Sabo’s pipe-fighting techniques to fulfill Sabo’s wish.
  • Bai Yu prepared to fight Ace, but the Strongest Template System unlocked and awarded him a gift pack for checking in voluntarily for fourteen years.

Ch. 2A wooden sword was enough

Bai Yu activated the Strongest Template System and received Kenpachi Zaraki as his base template. As Ace prepared to set sail, the two faced off at the docks, with Bai Yu confident that a wooden sword would be enough to defeat him.

  • Bai Yu opened the beginner's gift pack, receiving two Talismans of Insight, one Talisman of Awakening, and the Kenpachi Zaraki template.
  • Ace challenged Bai Yu to a duel with the pipe-fighting skills he had secretly learned from Sabo.
  • Bai Yu revealed that he knew about Ace's hidden skills and claimed he would beat him with swordsmanship.
  • Bai Yu warned Ace to leave before Garp returned, and Ace agreed to fight outside before setting sail.
  • Bai Yu borrowed a cobweb-covered wooden sword from Makino and followed Ace to the docks, where villagers gathered to watch their duel.

Ch. 3One Slash Sent Ace Flying

Bai Yu used the Kenpachi Zaraki template’s Spiritual Pressure and a wooden sword to defeat Ace with one slash at the Foosha Village dock. The victory raised his template progress to five percent, and he asked the system to unlock his new skill.

  • Ace challenged Bai Yu and offered to let him change weapons, but Bai Yu refused and kept his wooden sword.
  • Bai Yu unleashed his savage fighting spirit, and the system announced that his Kenpachi Zaraki template had reached one percent and granted him ultimate Spiritual Pressure.
  • Ace charged Bai Yu, but the Spiritual Pressure stopped him and Bai Yu’s slash broke Ace’s pipe and sent him crashing into a reef.
  • The system raised Bai Yu’s template progress to five percent and awarded him fifty system points.
  • Bai Yu checked the system shop, then asked the system to unlock the skill he had earned.

Ch. 4Only Kids Become Pirate King

Bai Yu helped an injured Ace recover and prepared him to set sail before Garp could stop him, while declaring that he would become a Marine. As Garp’s warship neared the dock, Ace faced the villagers’ pleas and looked to Bai Yu for support.

  • Bai Yu unlocked Sword Pressure, then noticed Garp’s Dog-Head Warship approaching as Ace lay injured from their fight.
  • Bai Yu gave Ace a Modified Nutrient Express, which quickly healed his fractured shoulder.
  • Bai Yu urged Ace to board and said he would become the Marine King so he could rescue Ace and Luffy if they were sent to Impel Down.
  • Ace drank Bai Yu’s liquor before preparing to leave, while Garp shouted from the approaching warship that he would sink him.
  • Makino, Mayor Dappu, and the villagers urged Ace to give up his plan, and Ace looked to Bai Yu as Garp drew closer.

Ch. 5My grandson has the makings of an Admiral

Ace set sail as a pirate, and Bai Yu protected his escape by striking Garp’s enormous iron ball out to sea. Impressed by Bai Yu’s swordsmanship, Bogard urged Garp to recruit him into Marine Headquarters, calling him a potential Admiral.

  • Bai Yu encouraged Ace to board the pirate ship and promised to cover him as it left the dock.
  • Garp attacked the fleeing ship with an extra-large iron ball, but Bai Yu told Ace to get away and faced the attack himself.
  • Bai Yu unleashed his spiritual pressure and knocked Garp’s iron ball into the sea with a powerful sword slash, sending Ace’s ship farther away.
  • Ace escaped and vowed to grow stronger before their next meeting, while Garp decided not to pursue him.
  • Bogard judged Bai Yu’s slash to be the work of a swordmaster and said Bai Yu had the makings of an Admiral; Garp laughed and asked whether Bogard had a recruitment plan.

Ch. 6The purpose of joining the Marines

After Bai Yu demonstrated a powerful Flying Slash, Garp and Bogard invited him to join Marine Headquarters, and Bai Yu agreed so he could protect his younger brothers. Bogard began explaining the seas and Haki, leaving Bai Yu to realize Garp had delayed teaching him in hopes of keeping him from going to sea.

  • Bogard urged Garp to bring Bai Yu to Marine Headquarters and arrange training before Bai Yu got himself killed at sea.
  • Bai Yu reflected that his Flying Slash put him halfway toward becoming a Swordmaster, though he had not yet mastered cutting iron.
  • Garp returned and struck Luffy with his Fist of Love, while Luffy blamed Bai Yu and Ace for calling Garp an old man.
  • Bogard offered Bai Yu a place at Marine Headquarters, but Bai Yu said he wanted to pursue swordsmanship and would join the Marines to protect his younger brothers.
  • Garp celebrated Bai Yu's decision and warned Luffy not to become a pirate, while Bai Yu considered how Garp's position might help him.
  • Bogard explained the Four Blues and the Grand Line, then asked Bai Yu why Garp's punches hurt Luffy; Bai Yu identified Haki and guessed Garp had delayed teaching him to discourage him from going to sea.

Ch. 7Can I Say I've Already Learned It?

Bogard explained Haki to Bai Yu, who used a Talisman of Insight to master Armament Haki almost instantly. The chapter ended with Bai Yu using another talisman to study Observation Haki while a dispirited Bogard returned to Garp.

  • Bogard asked Bai Yu about his swordsmanship, then explained how Observation Haki and Armament Haki worked.
  • Bai Yu used a Talisman of Insight and found that the explanation became clear as his Haki began circulating through his body.
  • Bai Yu coated his arm in Armament Haki, stunning Bogard after claiming he had already learned it.
  • Bogard left in dejection, and Bai Yu resolved to act less capable when learning Observation Haki.
  • Bai Yu crushed another Talisman of Insight to master Observation Haki while Bogard returned to Garp at the tavern.

Ch. 8Have you ever seen a true genius?

Bogard told Garp that Bai Yu learned Armament Haki after hearing one explanation, astonishing them both. At the pier, Bai Yu mastered Observation Haki across a thousand meters and used it to hit fish leaping from the sea.

  • Bogard returned to the tavern and told Garp he was unqualified to teach Bai Yu after the young man learned Armament Haki from a single explanation.
  • Garp crushed his glass and rushed out to verify Bogard’s claim, while Bogard followed, hoping to teach Bai Yu Observation Haki.
  • At the pier, Bai Yu used the Talisman of Insight to extend his Observation Haki across a thousand meters and sensed the Lord of the Coast farther out at sea.
  • Bai Yu flicked pebbles at fish as they leaped from the water, killing twenty or thirty before opening his eyes.

Ch. 9Could He Have the Disposition of a Conqueror Too?

Bai Yu used the Talisman of Awakening while Garp and Bogard tested his newly learned Observation Haki, and he effortlessly dodged their attacks. Bogard wondered whether Bai Yu might also possess Conqueror’s Haki.

  • Bai Yu used the Talisman of Awakening to try to uncover his potential.
  • Garp ambushed Bai Yu with an Armament Haki punch, but Bai Yu instinctively dodged and sent Garp crashing into the sea.
  • Garp realized Bai Yu had learned Observation Haki and told him Bogard was already behind him.
  • Bogard attacked Bai Yu with One Sword Style: Starlight, and Bai Yu evaded every thrust using precise predictions.
  • Garp and Bogard concluded Bai Yu’s Observation Haki had reached the intermediate level, and Bogard asked whether he might also have the disposition of a conqueror.

Ch. 10Was Conqueror's Haki That Gust of Wind?

Bai Yu revealed that he had awakened Conqueror's Haki when its force knocked out the Lord of the Coast and nearby sea creatures, astonishing Garp and Bogard. With Makino's help, he secretly set sail from Windmill Village, intending to find stronger opponents before reaching Marine Headquarters.

  • Garp and Bogard questioned Bai Yu about Conqueror's Haki, and Bai Yu admitted that he had triggered it accidentally.
  • When the Lord of the Coast attacked, Bai Yu released Conqueror's Haki and knocked it and the other sea creatures unconscious.
  • Garp celebrated Bai Yu's talents and declared that his grandson would become a Marine King, while Bogard joined his excitement.
  • Bai Yu told Makino he planned to leave soon, and she promised to keep it secret and revealed that she had prepared supplies and a boat for him.
  • Bai Yu left Windmill Village by boat under cover of night, hoping to challenge stronger opponents before reaching Marine Headquarters.

Ch. 11Sentomaru, the Haki prodigy

At Marine Headquarters, Sengoku discussed Treasure’s attack on the Goa Kingdom and ordered Garp to deal with the fugitive. He then reviewed Zephyr’s recruit files, highlighting several promising newcomers, including Sentomaru, a Haki prodigy.

  • An adjutant reported that Treasure had robbed the Goa Kingdom’s treasury and escaped the Marines.
  • Sengoku reprimanded the officers and agreed with Tsuru’s suggestion to have Garp pursue Treasure in the East Blue.
  • Sengoku reviewed Zephyr’s recruit files and said the recruits needed real combat experience against pirates.
  • Kizaru pointed out several Devil Fruit users among the recruits, and Sengoku warned him not to provoke Zephyr.
  • Tsuru named Tashigi, T-Bone Penn, Ain, Binz, and Sentomaru as notable newcomers, describing Sentomaru as a Haki prodigy.

Ch. 12Have you ever seen a true genius?

Sengoku and Tsuru discussed Sentomaru’s Haki potential before Garp called to announce that his sixteen-year-old grandson, Bai Yu, had reached the Swordmaster realm, awakened all Three Types of Haki, and shown Admiral-level potential. The Marines were left stunned by Garp’s claim.

  • Sengoku and Tsuru praised Sentomaru for mastering Armament Haki and nearing the chance to awaken Observation Haki.
  • Sengoku complained that Garp had failed to bring promising recruits back from the East Blue, and Tsuru suggested Garp might have found one.
  • Tsuru answered Garp’s Den Den Mushi and warned him that Sengoku was furious.
  • Garp announced that his grandson Bai Yu had reached the Swordmaster realm at sixteen, awakened all Three Types of Haki, and reached a Doriki of five hundred.
  • The Marines erupted in disbelief and recognized that Bai Yu could have the makings of an Admiral.

Ch. 13The fastest way to unlock

Sengoku learned from Garp that Bai Yu had mastered the Three Types of Haki and ordered a rescue mission after discovering he had sailed alone. Lost at sea, Bai Yu trained to unlock more of his template, then sensed an approaching pirate ship carrying an old acquaintance.

  • Garp told Sengoku that Bai Yu had the Three Types of Haki, was a Swordmaster, and had the makings of an Admiral.
  • Sengoku ordered Garp to bring Bai Yu to Marine Headquarters, then learned Bai Yu had already sailed alone.
  • Sengoku sent Onigumo to the East Blue and instructed Smoker in Loguetown to support Bai Yu.
  • Bai Yu completed his daily sword-swinging mission, raising his main-body template unlock progress to 5.1%.
  • Bai Yu realized he was lost at sea and decided that battles would unlock his template faster than daily training.
  • Bai Yu detected an approaching pirate ship with Observation Haki and recognized an old acquaintance aboard.

Ch. 14He Was More Dangerous Than This Sea

Bai Yu arrived as Zoro was being pursued by Black Axe and slaughtered the pirates with his wooden sword. He left Black Axe and the surviving pirates facing a foe more dangerous than the sea.

  • After a day and night of pursuit, exhausted Zoro fought off Black Axe’s cannon fire while Black Axe taunted him and ordered his men to keep attacking.
  • Bai Yu approached in a small boat, ignored Zoro’s warning to flee, and used his wooden sword to split the falling cannonballs.
  • Bai Yu boarded the pirate ship and, influenced by Kenpachi Zaraki’s template, challenged the pirates to fight.
  • Black Axe ordered his hundred-odd men to kill Bai Yu, but Bai Yu cut through their ranks and killed more than half of them within moments.
  • Zoro watched as the surviving pirates froze in terror at Bai Yu’s brutality and bloodthirsty smile.

Ch. 15The Gotei 13 Are All Blade Wielders

Bai Yu defeated Black Axe and his pirates, then overwhelmed Zoro in a brief sword fight and told him about the Gotei 13. He discovered two girls trying to steal the ship’s treasure and confronted them inside the cabin.

  • Black Axe fired a cannon at Bai Yu, who cut through the cannonball and Black Axe with a single slash, leaving the other pirates to flee into the sea.
  • Zoro challenged Bai Yu with his Three-Sword Style, but Bai Yu stopped his attack with one finger and then sent him crashing into his boat, breaking his swords and injuring him.
  • Bai Yu told Zoro he came from the Gotei 13 and that Zoro was far from its top ten thousand; Zoro vowed to become stronger and reach its top hundred.
  • Bai Yu split open the cabin door and caught two girls trying to escape through a window with a wooden chest.
  • One of the girls claimed she belonged to Boss Black Axe and warned Bai Yu that he would kill him.

Ch. 16The Phantom Thief Duo

Bai Yu confronted the thieves Nami and Carina, spared them, and conscripted them to serve aboard his ship. The group discovered a powerful cursed sword in a wooden box, and Bai Yu recognized it as likely one of the Twenty-One Great Grade Swords.

  • Bai Yu revealed that he knew Nami and Carina were the East Blue's Phantom Thief Duo and said he was a trainee Marine.
  • Carina attacked Bai Yu to give Nami a chance to escape, but her dagger snapped against his chest.
  • Bai Yu spared Nami and Carina but conscripted Nami as his navigator and Carina to handle the helm and daily needs.
  • Carina told Bai Yu about a wooden box that supposedly contained a Famous Sword, and Zoro joined them as they opened it.
  • The group saw a blood-red cursed sword emit a sinister presence, and Bai Yu judged it was likely one of the Twenty-One Great Grade Swords.

Ch. 17Demon Sword Murasame, One of the Twenty-One Great Grade Swords

Bai Yu took the Demon Sword Murasame from Zoro and resisted its devouring power, then used it to kill a Sea King with a massive slash. He checked his status and considered Zoro a promising source of future template progress.

  • Carina identified the blade as Demon Sword Murasame, one of the Twenty-One Great Grade Swords, and Zoro touched it before she could stop him.
  • Murasame began draining Zoro, but Bai Yu kicked him aside and grabbed the sword himself.
  • Murasame drained Bai Yu's arm and flooded his mind with malice, but Kenpachi Zaraki's influence let him resist and unleash his Haki.
  • Bai Yu restored his withered arm with the Three Types of Haki and swung Murasame, cutting through the sea and killing a Sea King a thousand meters away.
  • Bai Yu checked his status panel and noted that Zoro had unlocked two percent of his main template.

Ch. 18The Navy rookie in the crosshairs

Bai Yu made Zoro and the others carry supplies rather than let them leave, while Treasure pursued two thieves and the Demon Sword Murasame in East Blue. Smoker set out to capture Treasure, dismissing the Navy rookie Bai Yu and refusing to prioritize his protection.

  • Bai Yu told Zoro to help carry supplies, then used Shunpo to retrieve his boat; Nami and the others stayed behind, afraid to flee.
  • On Olai Island, Treasure killed Iron Head with his chain and berated his crew for failing to find two thieves.
  • Treasure learned that Smoker was pursuing him and that Bai Yu was also a target, then ordered his crew to recover the Demon Sword Murasame and set sail in their camouflaged ship.
  • A cloaked man with a Navy uniform hidden beneath his cloak followed Treasure's crew from the tavern.
  • Smoker learned Treasure had left Olai Island and planned to capture him, dismissing the assignment to protect Bai Yu as unnecessary.

Ch. 19Sorry, I Only Have a Fifty Percent Chance of Winning

Bai Yu completed his sword-training quest and learned that Nami and Carina had stolen goods from the treasure hunter Treasure after helping him search for the Demon Sword Murasame. He agreed to deal with Treasure, who wielded the Jangle-Jangle Fruit, but said he currently had only a fifty percent chance of winning.

  • Bai Yu finished ten thousand slashes, unlocked another 0.1 percent of his template, and impressed Zoro with a Flying Slash.
  • Bai Yu found Nami hiding in his room and asked her and Carina to explain their trouble with Treasure.
  • Carina revealed that she and Nami had helped Treasure search for the Demon Sword Murasame, then took the goods because they expected him to betray them.
  • Nami said Treasure could create chains with the Jangle-Jangle Fruit and had killed a pirate with a ten-million-Beli bounty.
  • Bai Yu said he could not ignore a pirate like Treasure, but estimated that he had only a fifty percent chance of defeating him.

Ch. 20The weak weren't even worthy of making their opponents get serious

Bai Yu brought Nami, Carina, and Zoro to Shimotsuki Village to learn how to cut steel before confronting Treasure, and he challenged Zoro’s teacher, Koshiro. Their opposing Sword Pressure tore the roof off Isshin Dojo as their fight began.

  • Bai Yu explained that he had only a fifty percent chance against Treasure because he could not yet cut steel, so he planned to learn the skill in Shimotsuki Village.
  • Zoro questioned whether anyone in the village could cut steel, but Bai Yu sensed a concealed presence and hurried to Isshin Dojo.
  • Koshiro left his students training and met Bai Yu, who revealed he was a Marine and asked to learn steel-cutting while challenging him.
  • Koshiro accepted Bai Yu’s challenge and chose to fight with wooden swords.
  • Bai Yu and Koshiro released opposing waves of Sword Pressure, and their clash ripped the dojo’s roof away.

Ch. 21Bai Yu Was Holding Back an Entire Ocean

Bai Yu fought Koshiro with reckless attacks and revealed that he had been restraining his power with weighted wrist guards. He unleashed his full Spiritual Pressure and blasted Koshiro through the dojo wall, but the fight continued as Koshiro sensed another attack coming.

  • Zoro rushed back to Isshin Dojo and watched Bai Yu and Koshiro clash with wooden swords.
  • Bai Yu endured Koshiro's thrusts with Armament Haki and drove him back with powerful, relentless slashes.
  • Koshiro covered his entire body in Armament Haki and announced that he would fight seriously.
  • Bai Yu removed a fifty-kilogram wrist guard, unleashing a vast surge of Spiritual Pressure while another guard remained on his wrist.
  • Bai Yu and Koshiro exchanged enormous blade auras, and Bai Yu's next heavy slash sent Koshiro through the dojo wall into the forest.
  • Koshiro steadied himself as his Observation Haki warned him of danger again.

Ch. 22Ten Percent Unlocked

Bai Yu fought Koshiro in a destructive duel, endured his Cutting Iron strike, and defeated him. The victory raised Bai Yu’s template progress to ten percent and unlocked Two-Handed Kendo.

  • Bai Yu and Koshiro exchanged powerful sword strikes that tore through the surrounding forest as Zoro watched.
  • Koshiro explained that Cutting Iron came from blending presence and will, then attacked Bai Yu with a strike carrying his sword intent.
  • Bai Yu took the slash on his shoulder and struck Koshiro in return, sending him crashing into a rock face and winning the duel.
  • Koshiro admitted defeat to Zoro while Bai Yu drank liquor and recovered from his wound.
  • The system rewarded Bai Yu with five hundred points, increased his template progress to ten percent, and unlocked Two-Handed Kendo.

Ch. 23He Really Wasn't Human

Koshiro explained sword momentum and intent to Bai Yu, who used a Talisman of Insight to master the Iron-Cutting Realm almost instantly. Bai Yu gave Zoro his weighted wrist guards, then revealed a much heavier training suit that crashed into the ground.

  • Koshiro described sword momentum and intent and estimated how long Bai Yu might need to reach the Iron-Cutting Stage.
  • Bai Yu bought two Talismans of Insight and a demon-modified weighted coat from the system shop.
  • Bai Yu used a Talisman of Insight and claimed he had mastered iron-cutting intent, leaving Zoro and Koshiro sensing a deadly change in him.
  • Bai Yu gave his weighted wrist guards to Zoro, who initially refused them but accepted their value as training equipment.
  • Bai Yu brought out a Demon-Modified Training Suit, whose impact cracked the ground beneath it.

Ch. 24Did That Count as Stealing a Kill from Afar?

After defeating his opponents, Bai Yu tested a weight-draining coat and learned that Treasure had reached Shimotsuki Village. He raced to the docks and killed Sec P with a wooden sword thrown from afar, leaving Treasure and his crew facing him.

  • Bai Yu put on a modified coat weighing three hundred kilograms that drained and stored his Spiritual Pressure.
  • An old man warned Koshiro that Marines were fleeing a pirate ship led by Treasure, and Bai Yu sensed Carina was in trouble at the docks.
  • Bai Yu launched his wooden sword toward the docks and chased after it while Zoro and Koshiro followed.
  • Treasure's crew cornered Carina as Marine Lieutenant Commander Domon called for help and warned Treasure that Smoker was coming.
  • Bai Yu's wooden sword smashed Sec P through Treasure's ship, killing him and breaking the hull.

Ch. 25Was He Really a Rookie?

Bai Yu arrived at the docks and easily overpowered Treasure, a pirate with an eighty-nine-million-Beli bounty, leaving the Marines astonished by the supposed rookie’s strength. Treasure encased himself in chains to form an absolute defense, while Koshiro told Zoro to watch and trust Bai Yu to find a way through it.

  • Bai Yu arrived after Carina told him Nami had disappeared and she had encountered Treasure’s men, then killed Sec P with a golden strike.
  • Treasure attacked Bai Yu with a chain-wrapped fist, but Bai Yu blocked it and cut him down with a Flying Slash that also wrecked the pirate ship.
  • Domon and the Marines learned Bai Yu was reportedly Vice Admiral Garp’s grandson, while Treasure attacked him with a chain shaped like an iron dragon and Bai Yu sent it flying.
  • Zoro worried that Bai Yu had not mastered cutting iron, prompting Koshiro to tell him to stay quiet and trust Bai Yu.
  • Treasure covered himself in three layers of chains and challenged Bai Yu to break through his defenses.
Arc 1 of 30
Arc 1 of 30