In the year 2080, the world is like it is now, yet different. Government-arranged marriages, elaborate plastic surgery, and medical science are at the forefront of Japanese society. Sanda Kazushige is a middle-school student who hasn't quite matured, despite being in the thralls of puberty. Put into a life-threatening situation by his classmate Fuyumura, Sanda discovers his uncanny ability to turn into a burly (and more grown) Santa Claus, and is thrown into a world of chaos to save his fellow students in only ways Santa Claus can do, while trying to solve the mysteries of the school he attends and the truth to where his supposedly-dead classmate Ono went.
Chapters
Chapter 142.5Vol. 16 ExtrasChapter 142Let's Go Santa Claus!Chapter 141The Days of Verifying the AnswersChapter 140The Splendor of Crushed StrawberriesChapter 139Revolver ReincarnationChapter 138Clutching the Invisible CertificateChapter 137Debate at the MomentChapter 136The Love Nest is Full of HolesChapter 135The Smelting Furnace Inside His BodyChapter 134Graduation Song and Walking StickChapter 133.5Vol. 15 ExtrasChapter 133The Woman Worth 100 BulletsChapter 132About 10 Pages of MeaninglessnessChapter 131Blood Donations to the Grim ReaperChapter 130At That Time, Our Eyes MetChapter 129The State of That River Over ThereChapter 128How to be a MummyChapter 127Inside the Sandcastle is Full of SandChapter 126The Best HeartbreakChapter 125The 130th Head of the Sanda FamilyChapter 124.5Vol. 14 ExtrasChapter 124An Answer to the PreviousChapter 123From My Friend with Pigtails, to YouChapter 122The Warmth of the Mud PacksChapter 121Withered Willows Planted in Both HandsChapter 120Drunk From a Lick of WineChapter 119The Aesthetics of a VillainChapter 118I Want to Shrink Your Dilator MusclesChapter 117Downloading Sheets of SutrasChapter 116Men of EloquenceChapter 115.5Vol. 13 ExtrasChapter 115The Frightening Satisfied GirlChapter 114Clench Your Tear GlandsChapter 113A Death Sentence in the Spring SunshineChapter 112The Giant SkullChapter 111The Curse of "Like Father, Like Daughter"Chapter 110Going Against the Milky WayChapter 109The Very Pink ScarChapter 108The Temple's SpaceshipChapter 107This is a Ritual Beyond MeasurementChapter 106.5Vol. 12 ExtrasChapter 106The Side Face Until the Adam's Apple AppearsChapter 105My Hated Words Are "Anger Management"Chapter 104To the Sparkled, Smokey SkyChapter 103Your Proper DisinfectionChapter 102Passive Smoking ChildrenChapter 101There's No Smoke Without FireChapter 100Believers and Gurus on the CliffChapter 99Complete WorshipChapter 98If You Don't Have It, Make It (Illegally)Chapter 97.5Vol 11. ExtrasChapter 97A Sled Transport from Ookami YamatoChapter 96Sanda's Three Paddy FieldsChapter 95The Bat Goes to the Slug NestChapter 94Rusting the ScalesChapter 93Emotions of a SharpenerChapter 92The Voice-Changing SirenChapter 91Whispering the True AgeChapter 90I Fell AsleepChapter 89Flower Arrangement for Black CompanyChapter 88.5Vol. 10 ExtrasChapter 88Exchanging the Pure White Sake CupsChapter 87After All, Let's Do a Rain Dance!Chapter 86Like a Sea Breeze That Makes Your Hair CreakChapter 85Respect For the Half-Broken ArmorChapter 84The Best Place for Marbled PatternChapter 83Don't Look AwayChapter 82There Seems to be a Boy Soiling His PantsChapter 81The Girl with the Gravitational Force of a MoonChapter 80Worshippable ProcessionChapter 79.5Vol 9. ExtrasChapter 79At Our Impregnable SchoolChapter 78Milky-White Filled SlugsChapter 77Salt OverdoseChapter 76The Parent Meeting in a RingChapter 75Why Do I Feel So Happy?Chapter 74The Awaited Sunset After Visiting a GraveChapter 73Aren't Tears Just Decorations?Chapter 72Recommendations for Amicable ResignationChapter 71Shall We Horror Dance?Chapter 70.5Vol. 8 ExtrasChapter 70The Full Moon That Locks You InChapter 69Smells Like Stewed PumpkinChapter 68Even If It's a Feline WhimChapter 67Welcome to Tokyo StationChapter 66Midnight Train in Broad DaylightChapter 65Eye-Opening CaffeineChapter 64Vending Machine, Turn off Your PowerChapter 63Bird of Peace with Bloodshot EyesChapter 62Thanks to the Seller's MarketChapter 61.5Vol. 7 ExtrasChapter 61No Touching Hands after BathChapter 60The Ransom in Your HeartChapter 59Glad You're HereChapter 58The Warm Snow That Never MeltsChapter 57Mitsuo Marukawa, 35 Years OldChapter 56The Whole Place Smells Like CigarettesChapter 55Wishing for Wrinkles like the North StarChapter 54The Very Cold-Hearted ManChapter 53The Jet Black ShrineChapter 52.5Vol. 6 ExtrasChapter 52Remember Him Laying DownChapter 51Countless Wisdom Teeth Know No OneChapter 50Please Take Your Time in the Small Waiting RoomChapter 49Only you Can Start Everything OverChapter 48I'd Love to Have Horns on your HeadChapter 47It Shows on the Front of the ShirtChapter 46Let's Shake Hands EnthusiasticallyChapter 45The Punch Tastes Like SweetenerChapter 44Give Him the RubyChapter 43.5Vol. 5 ExtrasChapter 43The Pale Blue CurtainChapter 42The After-Party for TwoChapter 41Because I'm HereChapter 40Cracking the Mirror. I Multiply MyselfChapter 39Remember Chapter 2? Santa is Immune to Fire.Chapter 38Exceeds the Speed LimitChapter 37The Invasion of the LanternsChapter 36The You in a Long TimeChapter 35Let the Vibrations be Heard in Your LullabyChapter 34.5OmakeChapter 34The Road to Adulthood is Ripped OffChapter 33Sentimental SunsetChapter 32I Want Pink NailsChapter 31Burning Youth - In an InstantChapter 30Even an Artificial Flower can RotChapter 29Be Wary of the Adult in a Black SuitChapter 28If You Play with Mud, You're Bound to Get DirtyChapter 27If it's a Cheek Without a BeardChapter 26The Biggest Whim is RomanceChapter 25.5Vol. 3 ExtrasChapter 25Children Who Take Off Their ShoesChapter 24Can You Cut a Cake?Chapter 23Two-Faced Carnivorous PlantChapter 22The Day I Realized My Friend's TalentChapter 21A Baby Born From TimeChapter 20Supernatural KickChapter 19The Truth Appears with Closed EyesChapter 18Cyborg vs. Santa ClausChapter 17In the Mountain of Red Sweaty JacketsChapter 16.5Vol. 2 ExtrasChapter 16Cells - A Night of ViolenceChapter 15Nameless GirlChapter 14My emergency airbag systemChapter 13The typhoon inside a snow globeChapter 12I still don’t know how to embrace a childChapter 11The textbook-tearing ZeusChapter 10Do not fear maturityChapter 9Nicotine-filled admirationChapter 8Fruits sweeten when burnedChapter 7Falling pelts of concreteChapter 6Falling BanterChapter 5A pledge taken in front of the cake shopChapter 4The trauma demonChapter 3Candies, whips, kisses and bladesChapter 2Their blazing inspirationChapter 1Everything is so dazzling... Is this growing up?