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One Piece: With Sign-in System

Ron finds himself reborn in the world of One Piece, stranded on a remote island in the East Blue. But he's not just any ordinary child—he’s bonded to a mysterious sign-in system that grants him powers with every new location he visits.At his first sign-in, he unlocks the legendary Sun Breathing Technique, along with a boost to his vitality. From Shitmotsuki Village to Skypiea, Enies Lobby to Marineford, Ron travels the world, collecting extraordinary rewards that make him a force to be reckoned with. The Raikiri, one of the 21 Great Grade Swords, Armament Haki, Observation Haki, and more fall into his hands.As Ron steps onto the battlefield of Marineford during the legendary Summit War, the mightiest warriors—Four Emperors and Marine Admirals alike—pause, stunned by his presence. But Ron merely waves them off, "Don’t mind me. I’m just passing through."Join Ron on his journey across the Grand Line as he signs in at iconic locations, growing stronger with every step. This is not just an adventure—it’s a legend in the making.
- Chapter 1: 01: In the East Blue, Starting with the Sun Breathing Technique from the Sign-In System
- Chapter 101: 101: The Warrior of the Giants
- Chapter 104: 104: A pleasant Sign-in Surprise at Loguetown
- Chapter 107: 107: The Arlong Pirates
- Chapter 11: Encounter with Zoro and the Dojo of Shimotsuki Village
- Chapter 112: 112: Drawing the Sword Against Admiral Aokiji
- Chapter 115: 115: Aokiji: I Think We Can Just Leave It for Now
- Chapter 118: 118: The Floating Island in the Night Sky of the North Blue
- Chapter 120: 120: The News That Shook the Seas! (Part 2)
- Chapter 123: 123: The Shocked Trafalgar Law
- Chapter 126: 126: Welcome, Vice-Captain
- Chapter 129: 129: Teaching the Breathing Techniques
- Chapter 131: 131: Reaching the Grand Line
- Chapter 134: 134: Facing Kizaru - An Epic Battle
- Chapter 137: 137: Kuina’s Thunderclap Flash—A Desperate Situation
- Chapter 14: Force, Will, Iron-Cutting:-The Path to Becoming a True Swordmaster
- Chapter 142: 142: That Madman!
- Chapter 145: 145: An invitation from the King!
- Chapter 148: 148: The New World Springs to Life
- Chapter 150: 150: A Sudden Attack
- Chapter 153: 153: Level 5 Conqueror's Haki!
- Chapter 156: 156: Surprisingly Weak, Huh?
- Chapter 159: 159: Die!
- Chapter 161: 161: Fury and Killing Intent from Beyond the Horizon!
- Chapter 164: 164: Armament Haki Stage Three, Ryuo!
- Chapter 167: 167: A Battle That Shatters Heaven and Earth!
- Chapter 17: The Vast Gap—Zoro's Unwillingness to Accept
- Chapter 172: 172: The Resolve to Become Stronger
- Chapter 175: 175: You Are... Ron?
- Chapter 178: 178: Earth-Shattering Slash—A Draw?
- Chapter 180: 180: The Frustrated Tashigi
- Chapter 183: 183: Reactions from All Sides, Vivi’s Hopes
- Chapter 186: 186: Sabo vs. Ron, an Undeniable Overwhelming Victory
- Chapter 189: 189: Fists and Kicks Are Enough
- Chapter 191: 191: Power Beyond an Admiral!
- Chapter 194: 194: Major Events Unfold One After Another, A Storm is Approaching! Prev
- Chapter 197: Tenseigan Eyes Awakening!
- Chapter 2: 02: Training and Growth
- Chapter 201: Rayleigh vs. Enel
- Chapter 204: You Are Not Worthy to Challenge Me
- Chapter 207: Chaos on the Battlefield!
- Chapter 21: Changing Kuina's Fate, the Decision to Leave
- Chapter 212: The Power of the ‘Calamity from the Skies’
- Chapter 22: A Swordsman Must Have Something to Protect; Zoro's Resolve
- Chapter 25: Arrival—Dragon and the Revolutionary Army
- Chapter 28: Kuina's First Display of Brilliance
- Chapter 30: 30: Makino's Tavern—Luffy, Ace, and Sabo
- Chapter 33: 33: Luffy: I Don’t Want to Be Pirate King Anymore—I Want to Be a Wanderer!
- Chapter 36: 36: Come Join the Marines, Ron!
- Chapter 39: 39: The Night of White Snow—Kuina and Ron’s Promise
- Chapter 41: 41: Water 7—Mastering Mechanics
- Chapter 44: 44: The Shock Brought by Haki
- Chapter 47: 47: Zephyr's Plan
- Chapter 5: 05: The Island Whose Peace Was Shattered
- Chapter 52: 52: The Sudden Malice—The Seven Warlords of the Sea
- Chapter 55: 55: The Old and Young Drink Under the Night Sky
- Chapter 58: 58: Momonga’s Special Training Method
- Chapter 60: 60: Momonga: It Seems I’ve Gotten Myself into Trouble
- Chapter 63: 63: Towards Impel Down
- Chapter 66: 66: The Three-Year Deadline Has Arrived—Time to Make a Decision
- Chapter 69: 69: Ron vs. Rayleigh—A Clash of Pure Destructive Power!
- Chapter 71: 71: The Definition of Pirates and the Classification of Haki Levels
- Chapter 74: 74: Drinking with a Skeleton in the Florian Triangle
- Chapter 77: 77: Revisiting Water 7
- Chapter 8: Good and Evil Reside in the Hearts of Ordinary People
- Chapter 82: 82: Ron Unleashes Full Power
- Chapter 85: 85: Leaving Skypiea—The First Companion
- Chapter 88: 88: The Rising Tension in Rainbase—An Uninvited Guest
- Chapter 90: 90: Crocodile's Killing Intent
- Chapter 93: 93: Eleventh Form—The Secrets of Water: Nagi (Calm)
- Chapter 96: 96: Princess Vivi and the boy in Black at the Mausoleum
- Chapter 99: 99: Daily Life at Sea—Enzo, the Talking Dugong
- Chapter 10: Signing In at Shimotsuki Village, Acquiring One of the 21 Great Swords—Raikiri!
- Chapter 102: 102: A Clash of Strength with the Giant Warrior!
- Chapter 105: 105: The Outsider in Cocoyasi Village
- Chapter 108: 108: Powers That Shock Nami
- Chapter 110: 110: The Legend of the East Blue
- Chapter 113: 113: A Spectacular Battle
- Chapter 116: 116: The Traveler Ventures into West Blue
- Chapter 119: 119: The News That Shook the Seas (Part 1)
- Chapter 121: 121: The Power of the Float-Float Fruit!
- Chapter 124: 124: Garp’s Punch!
- Chapter 127: 127: The Potential of the Fifth Emperor?
- Chapter 13: Growing Stronger Together: Days in the Dojo
- Chapter 132: 132: On Drum Island
- Chapter 135: 135: Calamity from the Skies vs. the Vice Admiral
- Chapter 138: 138: A Sky Filled with Meteors
- Chapter 140: 140: First Encounter with the Empress
- Chapter 143: 143: Signing In at Fish-Man Island
- Chapter 146: 146: "Pleased to Meet You too, Ron..."
- Chapter 149: 149: Ultimate Kick Level 3!
- Chapter 151: 151: Zephyr’s Questioning
- Chapter 154: 154: The Trio at Dressrosa
- Chapter 157: 157: The Fall of the Donquixote Family and the Sky-Splitting Black Slash
- Chapter 16: The Three Swordsmen Destined for Fame Across the Seas
- Chapter 162: 162: The Fury of the Traveler!
- Chapter 165: 165: Kaido, Get Out Here!
- Chapter 168: 168: Kaido’s Strongest Form, Ron’s Ultimate Finisher!
- Chapter 170: 170: Zou, Carrot and the Cat Viper Leader
- Chapter 173: 173: Two Years Later
- Chapter 176: Let’s Change the Location
- Chapter 179: 179: The Swordsman’s Lonely Throne
- Chapter 181: 181: Joking? No, I’m Serious
- Chapter 184: 184: Ron: Unjust Rules Have No Right to Exist!
- Chapter 187: 187: The Four-Person Conference That Decides the World's Fate
- Chapter 19: The Extension of the Original Breathing Technique—Thunder Flash
- Chapter 192: 192: A Joint Attack from Two Admirals!
- Chapter 195 195: 195: On the Empty Throne, Imu
- Chapter 198: The Terrifying Might of the Tenseigan Eye!
- Chapter 20: Can Alcohol Boost a Swordsman's Spirit...?
- Chapter 202: The Grim Reaper Descends Upon Eternal Hell
- Chapter 205: The Summit War Begins!
- Chapter 208: The Might of the Marines
- Chapter 210: Beyond Imagination, Near-Invincible Power!
- Chapter 213: The Intensifying Summit War!
- Chapter 23: The Two Who Left Together
- Chapter 26: An Unexpected Encounter with Sabo
- Chapter 29: 29: The Shock of the Crowd
- Chapter 31: 31: Teach Us How to Get Stronger!
- Chapter 34: 34: Sabo's Departure and the Promise to Set Sail
- Chapter 37: 37: Garp’s Justice and The Conditions to Teach Haki
- Chapter 4: 04: The Breakthrough of the Sun Breathing Technique
- Chapter 42: 42: Marine Headquarters—Marineford
- Chapter 45: 45: A Name That Shone Briefly on the Seas
- Chapter 48: 48: Then Let’s Fight
- Chapter 50: 50: The Crimes of Pirates, the Incompetence of the Marines
- Chapter 53: 53: Celestial Demon
- Chapter 56: 56: The Intentions of the World Government
- Chapter 59: 59: That…is a Swordmaster’s Strike!
- Chapter 61: 61: A Heart Like Stone, A Will That Can Cut Iron
- Chapter 64: 64: Passing by Enies Lobby
- Chapter 67: 67: The Journey Begins at Sabaody Archipelago
- Chapter 7: The Sudden Criticism
- Chapter 72: 72: A Gunshot in Desperation
- Chapter 75: 75: The Ultimate Kick
- Chapter 78: 78: The Traveler's Ship
- Chapter 80: 80: Ultimate Mind's Eye—Major Advancement in Observation Haki!
- Chapter 83: 83: Head-On Collision
- Chapter 86: 86: The Kung Fu Dugong of Arabasta
- Chapter 89: 89: This Devil Fruit - its mine now
- Chapter 91: 91: Battle with Crocodile (Part 1)
- Chapter 94: 94: So... Shall We Walk Together?
- Chapter 97: 97: Ron's Disciple, Kung Fu Dugong Enzo
- Chapter 100: 100: The Island of the Ancients
- Chapter 103: 103: The Results of Special Training—A Slash That Splits the Sea
- Chapter 106: 106: 12-Year-Old Nami and a Special Sign-in Reward
- Chapter 109: 109: Broadening Horizons
- Chapter 111: 111: The Vice-Captain of the Traveler
- Chapter 114: 114: Congratulations—You’ve Found Your Home
- Chapter 117: 117: One Punch to Sharpen Your Head
- Chapter 12: The Gap Between Kuina and Ron
- Chapter 122: 122: Law: Bring the Ship Closer
- Chapter 125: 125: The Float-Float Fruit User
- Chapter 128: 128: Descending from the Sky
- Chapter 130: 130: The Vision for the Float-Float Fruit’s Powers
- Chapter 133: 133: The Tyrant—Bartholomew Kuma!
- Chapter 136: 136: Kizaru’s Light-Speed Kick!
- Chapter 139: 139: Farewell to Rayleigh
- Chapter 141: 141: Delivering an Island to Mary Geoise
- Chapter 144: 144: The Poneglyph at Fish-man Island
- Chapter 147: 147: The Mermaid Princess, Shirahoshi
- Chapter 15: Monster Ron
- Chapter 152: 152: Seeking Doflamingo for Payback
- Chapter 155: 155: The Panicked Donquixote Family!
- Chapter 158: 158: The Beaten-Down Doflamingo
- Chapter 160: 160: A Massive Crisis! King!
- Chapter 163: 163: The New World Trembles, A Storm is Brewing
- Chapter 166: 166: Kaido Transforms into a Dragon!
- Chapter 169: 169: The Destruction of Onigashima, Supreme Grade Blade – Blood Moon!
- Chapter 171: 171: What’s there in the forest?
- Chapter 174: 174: A Familiar Voice
- Chapter 177: 177: A Duel of Swordsmanship Between Top Grandmasters!
- Chapter 18: A Real Sword Duel with Koushirou
- Chapter 182: 182: How Is That Guy Still Alive?!
- Chapter 185: 185: He’s Not Here? I’ll Do It!
- Chapter 188: 188: The Shocked Gion and Tashigi
- Chapter 190: 190: Kizaru at a Disadvantage
- Chapter 193: 193: The Navy Lacks Manpower, World Military Draft Begins!
- Chapter 196 196: 196: Return to Amazon Lily
- Chapter 199: Ace Captured, The Curtain Rises on the Summit War!
- Chapter 200: Fujitora and Ryokugyu, The Navy’s Forces Assemble!
- Chapter 203: So-Called Comrades
- Chapter 206: An All-Out War Erupts!
- Chapter 209: Ron Takes Action
- Chapter 211: Universal... Pull!
- Chapter 214: Aramaki and Gion Make Their Move
- Chapter 24: Ivankov's Shock
- Chapter 27: Permanent Buff—The True Essence of "Tempering Through Ten Thousand Trials"
- Chapter 3: 03: The Eight-Year-Old Body Craves the Nutrition of Meat
- Chapter 32: 32: Days of Training Together
- Chapter 35: 35: Astonished Garp
- Chapter 38: 38: Fleet Admiral Sengoku Can't Keep Calm
- Chapter 40: 40: Parting Ways—The Determination to Grow Stronger
- Chapter 43: 43: Smoker: Stop Joking Around!
- Chapter 46: 46: Smoker's Plan, and Hina's Curiosity
- Chapter 49: 49: Zephyr's Guidance
- Chapter 51: 51: A Strike Filled with Intent to Kill
- Chapter 54: 54: Observation Haki Awakened and The Heavy Price Paid by the Marines
- Chapter 57: 57: A Swordsmanship Duel with Momonga
- Chapter 6: Ron Takes Action, Astonishing Everyone
- Chapter 62: 62: The Transparent World
- Chapter 65: 65: Sign-In at Impel Down
- Chapter 68: 68: Dark King Rayleigh
- Chapter 70: 70: Rayleigh is Shocked
- Chapter 73: 73: This Ship—It’s Mine Now
- Chapter 76: 76: Taking on Gecko Moria's Entire Crew
- Chapter 79: 79: Flying to Skypiea and The UFO Above the Sky Island
- Chapter 81: 81: Clash with Enel
- Chapter 84: 84: M-My Name is Conis
- Chapter 87: 87: The News of the Devil Fruit
- Chapter 9: The Demon-like Boy and the Desperate Pirate Leader
- Chapter 92: 92: Battle with Crocodile (Part 2)
- Chapter 95: 95: The Power to Control Iron
- Chapter 98: 98: Decoding the Poneglyph—Robin's Shock