Mash-Up: I'm Not A Substitute
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Ongoing
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Halflings
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Romance
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Synopsis
In a world where relationships are often built on pretense, Takashi Kitahara finds himself caught in a web of emotional manipulation. Surrounded by girls who openly declare him a mere stand-in—be it for lost loves or familial ties—he grapples with the harsh reality of their intentions. Kasumigaoka Utaha, Sawamura Eriri, and Yasuraoka Hanabi each make it clear: he’s just a substitute for someone else. As they distance themselves, Takashi experiences a mix of frustration and introspection. But what happens when he decides to voice his feelings? With a bold declaration that he may not be interested in any of them, he challenges their assumptions and embarks on a journey of self-discovery and authenticity.
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Latest Release:
Chapter 223
Oct 15th, 2025
Chapter 1: Substitute Literature
Sep 24th, 2025
Chapter 2: Don’t Force Us to Kneel
Sep 24th, 2025
Chapter 3: Double the Fun!
Sep 24th, 2025
Chapter 4: 4: What Camera Do You Use?
Sep 25th, 2025
Chapter 5: 5: The Stand-In Starts to Change
Sep 25th, 2025
Chapter 6: 6: Not Cute At All
Sep 25th, 2025
Chapter 7: 7: I Deserve Better
Sep 25th, 2025
Chapter 8: 8: Are You Looking for My Girlfriend?
Sep 25th, 2025
Chapter 9: 9: You don't want that either, do you~?
Sep 25th, 2025
Chapter 10: 10: What kind of whispering is that?
Sep 25th, 2025
Chapter 11: 11: Life is like a play, it all depends on your acting skills
Sep 25th, 2025
Chapter 12: 12: Have a Boyfriend, But Still Available for a Date???
Sep 25th, 2025
Chapter 13: 13: Come on, you're so pretentious.
Sep 25th, 2025
Chapter 14: 14: Did you do that on purpose?
Sep 25th, 2025
Chapter 15: 15: Shijo Maki has sent you a date invitation.
Sep 25th, 2025
Chapter 16: 16: Fishing for Black Carp
Sep 25th, 2025
Chapter 17: 17: Oh no, I’ve become a strategist.
Sep 25th, 2025
Chapter 18: 18: You Haven’t Left Yet
Sep 25th, 2025
Chapter 19: 19: I Really Don’t Like Feet
Sep 25th, 2025
Chapter 20: 20: Another Fool
Sep 25th, 2025
Chapter 21: 21: Abandon the Impossible
Sep 25th, 2025
Chapter 22: 22: Abandon the Impossible (2)
Sep 25th, 2025
Chapter 23: 23: Takashi Is Not Very Good At This
Sep 25th, 2025
Chapter 24: 24: System, please act like a human being.
Sep 27th, 2025
Chapter 25: 25: Hello
Sep 27th, 2025
Chapter 26: 26: Hello (2)
Sep 27th, 2025
Chapter 27: 27: No
Sep 27th, 2025
Chapter 28: 28: No (2)
Sep 27th, 2025
Chapter 29: 29: Landlord, your tenant is being bullied.
Sep 27th, 2025
Chapter 30: 30: Don’t Force Me to Kneel
Sep 27th, 2025
Chapter 31: 31: What are you doing?
Sep 27th, 2025
Chapter 32: 32: Do you think I wouldn’t trust you?
Sep 27th, 2025
Chapter 33: 33: Points
Sep 27th, 2025
Chapter 34: 34: The last person who did this was called..
Sep 27th, 2025
Chapter 35: 35: Today, I Will Not Return Empty-Handed
Sep 27th, 2025
Chapter 36: 36: No way, why?!
Sep 27th, 2025
Chapter 37: 37: Innate Fishing Holy Body
Sep 27th, 2025
Chapter 38: 38: Just Think of It as an Investment
Sep 27th, 2025
Chapter 39: 39: She is mine
Sep 27th, 2025
Chapter 40: 40: Don't meet again in the future
Sep 27th, 2025
Chapter 41: 41: You Are Just A Substitute
Sep 27th, 2025
Chapter 42: 42: You Have a Senpai Too?
Sep 27th, 2025
Chapter 43: 43: What Are You Wiping the Chopsticks For?
Sep 27th, 2025
Chapter 44: 44: It Will Stick Out
Sep 29th, 2025
Chapter 45: 45: Once Dependence Forms
Sep 29th, 2025
Chapter 46: 46: Yotsuba, This Looks Like You!
Sep 29th, 2025
Chapter 47: 47: Yotsuba, This Looks Like You! (2)
Sep 29th, 2025
Chapter 48: 48: Crowded Train Scene
Sep 29th, 2025
Chapter 49: 49: The Train Ruined His Tokyo University Dream!
Sep 29th, 2025
Chapter 50: 50: It's a mistake
Sep 29th, 2025
Chapter 51: 51: It’s a mistake (2)
Sep 29th, 2025
Chapter 52: 52: Another Day Played by Woman
Sep 29th, 2025
Chapter 53: 53: Another Day Played by Woman (2)
Sep 29th, 2025
Chapter 54: 54: Only Cowardice
Sep 29th, 2025
Chapter 55: 55: Experiencing an Ordinary Life
Sep 29th, 2025
Chapter 56: 56: Boys?
Sep 29th, 2025
Chapter 57: 57: Boys? (2)
Sep 29th, 2025
Chapter 58: 58: Opportunity Favors the Prepared
Sep 29th, 2025
Chapter 59: 59: Date Change
Sep 29th, 2025
Chapter 60: 60: What Is He Doing?
Sep 29th, 2025
Chapter 61: 61: So cute, right?
Sep 29th, 2025
Chapter 62: 62: Why Are You Insulting Me?
Sep 29th, 2025
Chapter 63: 63: Kitahara-kun, You're Acting Strange
Sep 29th, 2025
Chapter 64: 64: I Want to Fully Experience High School Life
Oct 1st, 2025
Chapter 65: 65: She slept next to me
Oct 1st, 2025
Chapter 66: 66: Yotsuba Who Wants to Hide Him
Oct 1st, 2025
Chapter 68: 68: Public Execution!
Oct 1st, 2025
Chapter 69: 69: Not Strong Enough
Oct 1st, 2025
Chapter 71: 71: What Do You Want From Me?
Oct 1st, 2025
Chapter 72: 72: I Will Make a Fool of Myself
Oct 1st, 2025
Chapter 73: 73: [Lemon]
Oct 1st, 2025
Chapter 74: 74: Where is the security guard
Oct 1st, 2025
Chapter 75: 75: The Last Date
Oct 1st, 2025
Chapter 76: 76: The Last Date (2)
Oct 1st, 2025
Chapter 77: 77: Are We About to Throw Down?
Oct 1st, 2025
Chapter 78: 78: What Do You Have to Beat Me?
Oct 1st, 2025
Chapter 79: 79: He Felt Like He Was Capable Again
Oct 1st, 2025
Chapter 80: 80: Be Careful
Oct 1st, 2025
Chapter 81: 81: I Don’t Believe It
Oct 1st, 2025
Chapter 82: 82: Opening in the Kabukicho District?
Oct 1st, 2025
Chapter 83: 83: I Have a Friend
Oct 1st, 2025
Chapter 84: 84: I Have a Friend (2)
Oct 1st, 2025
Chapter 85: 85: Do Men Have Such a Short Prime?
Oct 1st, 2025
Chapter 86: 86: No way, sir, you’re carrying a gun?
Oct 3rd, 2025
Chapter 87: 87: Do I Look Like a Fool?
Oct 3rd, 2025
Chapter 88: 88: Do I Look Like a Fool? (2)
Oct 3rd, 2025
Chapter 89: 89: So how many people actually heard that night?
Oct 3rd, 2025
Chapter 90: 90: So how many people actually heard that night? (2)
Oct 3rd, 2025
Chapter 91: 91: The Disappearing Dog
Oct 3rd, 2025
Chapter 92: 92: The Disappearing Dog (2)
Oct 3rd, 2025
Chapter 93: 93: It Really Stinks
Oct 3rd, 2025
Chapter 94: 94: It Really Stinks (2)
Oct 3rd, 2025
Chapter 95: 95: He’s Really Amazing
Oct 3rd, 2025
Chapter 96: 96: He’s Really Amazing (2)
Oct 3rd, 2025
Chapter 97: 97: Blond Punks, School Girl, Old Farts—Get It?
Oct 3rd, 2025
Chapter 98: 98: Blond Punks, School Girl, Old Farts—Get It? (2)
Oct 3rd, 2025
Chapter 99: 99: I Long for His Approval
Oct 3rd, 2025
Chapter 100: 100: I Long for His Approval (2)
Oct 3rd, 2025
Chapter 101: 101: If You Won’t Do It, Plenty of Others Will
Oct 3rd, 2025
Chapter 102: 102: If You Won’t Do It, Plenty of Others Will (2)
Oct 3rd, 2025
Chapter 103: 103: At Least I Won’t Mistook the Wrong Person
Oct 3rd, 2025
Chapter 104: 104: At Least I Won’t Mistook the Wrong Person (2)
Oct 3rd, 2025
Chapter 105: 105: Face-to-Face Conspiracy
Oct 3rd, 2025
Chapter 106: 106: Face-to-Face Conspiracy (2)
Oct 5th, 2025
Chapter 107: 107: I Want You, So You’re Mine?
Oct 5th, 2025
Chapter 108: 108: I Want You, So You’re Mine? (2)
Oct 5th, 2025
Chapter 109: 109: I Want You, So You’re Mine? (3)
Oct 5th, 2025
Chapter 110: 110: Why Is It You Again?
Oct 5th, 2025
Chapter 111: 111: Why Is It You Again? (2)
Oct 5th, 2025
Chapter 112: 112: Not That Awkward Either
Oct 5th, 2025
Chapter 113: 113: Complete Madness
Oct 5th, 2025
Chapter 114: 114: Next Time There's an Event Like This, Call Me
Oct 5th, 2025
Chapter 115: 115: Next Time There's an Event Like This, Call Me (2)
Oct 5th, 2025
Chapter 116: 116: Instigation
Oct 5th, 2025
Chapter 117: 117: So Familiar Already?
Oct 5th, 2025
Chapter 118: 118: Likes Dominance, Likes Domestic Violence
Oct 5th, 2025
Chapter 119: 119: Money Is Hard to Earn
Oct 5th, 2025
Chapter 120: 120: The Show Begins
Oct 5th, 2025
Chapter 121: 121: Miku is the Best
Oct 5th, 2025
Chapter 122: 122: Do You Think You're Funny or Something?
Oct 5th, 2025
Chapter 123: 123: How Cute~
Oct 5th, 2025
Chapter 124: 124: Narcissism Is a Disease
Oct 5th, 2025
Chapter 125: 125: Kitahara Takashi, What Kind of Man Are You?
Oct 5th, 2025
Chapter 126: 126: Are you still in contact with that stand-in?
Oct 7th, 2025
Chapter 127: 127: I thought you liked being stepped on?
Oct 7th, 2025
Chapter 128: 128: Japanese-Style Inequality?
Oct 7th, 2025
Chapter 129: 129: Could she really be your girlfriend?
Oct 7th, 2025
Chapter 130: 130: I was There.
Oct 7th, 2025
Chapter 131: 131: Let Me Go
Oct 7th, 2025
Chapter 132: 132: How Wonderful, She Actually Blesses Us
Oct 7th, 2025
Chapter 133: 133: What did you say his name was?
Oct 7th, 2025
Chapter 134: 134: Can liking be faked?
Oct 7th, 2025
Chapter 135: 135: How did this handkerchief end up with you?
Oct 7th, 2025
Chapter 136: 136: Hesitation leads to defeat.
Oct 7th, 2025
Chapter 137: 137: The One Playing Both Sides Is You.
Oct 7th, 2025
Chapter 138: 138: Eating Tofu
Oct 7th, 2025
Chapter 139: 139: Who Are You?
Oct 7th, 2025
Chapter 140: 140: Lifelong Enemy
Oct 7th, 2025
Chapter 141: 141: Because I've Always Been Watching You
Oct 7th, 2025
Chapter 142: 142: I Will Make You Like Me!
Oct 7th, 2025
Chapter 143: 143: I Don’t Have a Phone
Oct 7th, 2025
Chapter 144: 144: Feeling Good
Oct 7th, 2025
Chapter 145: 145: Stammering
Oct 7th, 2025
Chapter 146: 146: Absurd Scenario
Oct 9th, 2025
Chapter 147: 147: Headphone Experience
Oct 9th, 2025
Chapter 148: 148: A Part of the Play?
Oct 9th, 2025
Chapter 149: 149: No Wonder He Likes Raising Dogs
Oct 9th, 2025
Chapter 150: 150: Get Up, You’re Crushing Me…
Oct 9th, 2025
Chapter 151: 151: I Thought You Didn’t Want Me Anymore
Oct 9th, 2025
Chapter 152: 152: You Are Not in My Future
Oct 9th, 2025
Chapter 153: NEW TRANSLATIONS
Oct 9th, 2025
Chapter 154: 153: The Childhood Friend Loses to the Newcomer.
Oct 9th, 2025
Chapter 155: 154: Is It Necessary to Distinguish?
Oct 9th, 2025
Chapter 156: 155: A Single Kick Shattered...
Oct 9th, 2025
Chapter 157: 156: Meeting the Parents?
Oct 9th, 2025
Chapter 158: 157: Next Time, Call Me Mom.
Oct 9th, 2025
Chapter 159: 158: You Called Just for This
Oct 9th, 2025
Chapter 160: 159: Who Do You Like, Him or Me?
Oct 9th, 2025
Chapter 161: 160: Because of You, I Look Forward to the Future.
Oct 9th, 2025
Chapter 162: 161: Kitahara Takashi, How Do You Want to Die?
Oct 9th, 2025
Chapter 163: 162: Did My First Kiss Just Disappear Like That?
Oct 9th, 2025
Chapter 164: 163: Danger!
Oct 9th, 2025
Chapter 165: 164: Today's Friend, Tomorrow's Little Sister
Oct 9th, 2025
Chapter 166: 165: Stepping on Four Boat
Oct 11th, 2025
Chapter 167: 166: Stepping on Four Boat (2)
Oct 11th, 2025
Chapter 168: 167: The Shovel
Oct 11th, 2025
Chapter 169: 168: The Shovel (2)
Oct 11th, 2025
Chapter 170: 169: Small Fry~
Oct 11th, 2025
Chapter 171: 170: Small Fry~ (2)
Oct 11th, 2025
Chapter 172: 171: I’m Going to Have a Brother-in-law
Oct 11th, 2025
Chapter 173: 172: I’m Going to Have a Brother-in-law (2)
Oct 11th, 2025
Chapter 174: 173: Watanabe Takashi? No, it's Aki Tomoya!
Oct 11th, 2025
Chapter 175: 174: Watanabe Takashi? No, it's Aki Tomoya! (2)
Oct 11th, 2025
Chapter 176: 175: You Hope Everything Will Go As You Wish.
Oct 11th, 2025
Chapter 177: 176: You Hope Everything Will Go As You Wish. (2)
Oct 11th, 2025
Chapter 178: 177: Should I Call Him Brother-in-law or Not?
Oct 11th, 2025
Chapter 179: 178: Should I Call Him Brother-in-law or Not? (2)
Oct 11th, 2025
Chapter 180: 179: Brother-in-law’s Got You Covered
Oct 11th, 2025
Chapter 181: 180: Brother-in-law’s Got You Covered (2)
Oct 11th, 2025
Chapter 182: 181: The Final Whisper
Oct 11th, 2025
Chapter 183: 182: The Final Whisper (2)
Oct 11th, 2025
Chapter 184: 183: Mrs. Sawamura's Plan
Oct 11th, 2025
Chapter 185: 184: Mrs. Sawamura's Plan (2)
Oct 11th, 2025
Chapter 186: 185: Let’s Climb Tokyo Tower Together
Oct 13th, 2025
Chapter 187: 186: Let’s Climb Tokyo Tower Together (2)
Oct 13th, 2025
Chapter 188: 187: Good Friends?
Oct 13th, 2025
Chapter 189: 188: Good Friends? (2)
Oct 13th, 2025
Chapter 190: 189: Takashi, the Victorious Half-Man
Oct 13th, 2025
Chapter 191: 190: Takashi, the Victorious Half-Man (2)
Oct 13th, 2025
Chapter 192: 191: The Sleeping Swallow
Oct 13th, 2025
Chapter 193: 192: The Sleeping Swallow (2)
Oct 13th, 2025
Chapter 194: 193: Sit Here
Oct 13th, 2025
Chapter 195: 194: Sit Here (2)
Oct 13th, 2025
Chapter 196: 195: The Tokyo Succubus Takashi
Oct 13th, 2025
Chapter 197: 196: The Tokyo Succubus Takashi (2)
Oct 13th, 2025
Chapter 198: 197: Big Sis Hitomi, Save Me
Oct 13th, 2025
Chapter 199: 198: Landlady, Do I Still Have a Chance?
Oct 13th, 2025
Chapter 200: 199: The Road You Couldn't Finish, I'll Walk It for You
Oct 13th, 2025
Chapter 201: 200: Dad?
Oct 13th, 2025
Chapter 202: 201: This Moment is Eternal
Oct 13th, 2025
Chapter 203: 202: You Can Dodge It
Oct 13th, 2025
Chapter 204: 203: You Might Be a Genius, But Koshien Is Full of Them
Oct 13th, 2025
Chapter 205: 204: Are You Planning to Go Into the Industry?
Oct 13th, 2025
Chapter 206: 205: Good Evening, Doma-san.
Oct 15th, 2025
Chapter 207: 206: Takashi, Stop Pretending.
Oct 15th, 2025
Chapter 208: 207: Not Willing to Be Just Friends
Oct 15th, 2025
Chapter 209: 208: Good Morning, Doma-san
Oct 15th, 2025
Chapter 210: 209: Give Me a Gun.
Oct 15th, 2025
Chapter 211: 210: Give Me a Gun. (2)
Oct 15th, 2025
Chapter 212: 211: You Have to Be the Best Too.
Oct 15th, 2025
Chapter 213: 212: You Have to Be the Best Too. (2)
Oct 15th, 2025
Chapter 214: 213: Son? Mom?
Oct 15th, 2025
Chapter 215: 214: Son? Mom? (2)
Oct 15th, 2025
Chapter 216: 215: I Consider You a Sister.
Oct 15th, 2025
Chapter 217: 216: I Consider You a Sister. (2)
Oct 15th, 2025
Chapter 218: 217: The Real Takashi?
Oct 15th, 2025
Chapter 219: 218: The Real Takashi? (2)
Oct 15th, 2025
Chapter 220: 219: He’s Not That Kind of Person.
Oct 15th, 2025
Chapter 221: 220: He’s Not That Kind of Person. (2)
Oct 15th, 2025
Chapter 222: 221: Run when you go see someone you like.
Oct 15th, 2025
Chapter 223: 222: Run when you go see someone you like. (2)
Oct 15th, 2025
Chapter 224: 223: Countdown to Breakup
Oct 15th, 2025
Chapter 225: 224: Countdown to Breakup (2)
Oct 15th, 2025
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