Onii-chan Is Done For! - Highschool ONIMAI (Doujinshi)
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Onii-chan Is Done For! - Highschool ONIMAI (Doujinshi)

Author: Kotobuki (琴吹)
Published: 2023
Type: Manga
Genderswap Romance Girls' Love Doujinshi School Life Web Comic Slice of Life
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Without being able to return to being a man, Mahiro Oyama stayed as a girl since middle school and now has become a beautiful high-schooler who gets completely dominated by his first friend since the transformation, Momiji Hozuki, who has gotten really tall and became popular with the girls in their school.
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Chapters (155)

Chapter 143: Expressing through Art
Apr 05, 2026
Chapter 142: HS - Momiji, who ranks number one in the "I want to be held" ranking in her class.
Mar 28, 2026
Chapter 141: HS - Asahi growing up in order to become the #1 most huggable girl in the ranking (2)
Mar 21, 2026
Chapter 140: Year of the Horse
Mar 14, 2026
Chapter 139: HS - Asahi growing up in order to become the #1 most huggable girl in the ranking.
Mar 08, 2026
Chapter 138: Sleepover
Feb 28, 2026
Chapter 137: Totally wholesome moment between guys
Feb 21, 2026
Chapter 136: Totally wholesome sister moment
Feb 14, 2026
Chapter 135: Mushroom Growth
Feb 07, 2026
Chapter 134: Wet dream after watching a certain movie
Jan 31, 2026
Chapter 133: Pocky Game (3)
Jan 24, 2026
Chapter 132: Upskirt
Jan 18, 2026
Chapter 131: Paralysis
Jan 12, 2026
Chapter 130: Ma-hiro Baiser
Jan 03, 2026
Chapter 129: Momiji's Birthday Gift
Dec 27, 2025
Chapter 128: A manga where JK Momiji feels sensitive to stares
Dec 20, 2025
Chapter 127: Papahiro gets cucked by his own son.
Dec 13, 2025
Chapter 126: HS - Mommy Genes
Dec 06, 2025
Chapter 125: So we're gonna do it right now?!
Nov 29, 2025
Chapter 124: Onii-chan wa Oshimai! in a Nutshell
Nov 22, 2025
Chapter 123: Domination Loss
Nov 15, 2025
Chapter 122: Food-flation
Nov 08, 2025
Chapter 121.5: Mahiro-chan, the girl(?) who looks good in summer
Nov 08, 2025
Chapter 121: JK Mahiro and Momiji and the porn books from those days (a timeline where he revealed herself as a man)
Nov 01, 2025
Chapter 120: "I wanted Mahiro-chan to say that famous line."
Oct 25, 2025
Chapter 119: You gettin' raped
Oct 18, 2025
Chapter 118: Robo-Mihari Mk. 2
Oct 11, 2025
Chapter 117.1: Rabbit Hole
Oct 05, 2025
Chapter 117: HS - Changing Sense of Distance
Sep 27, 2025
Chapter 116: What if Mahiro-chan continues growing as a girl
Sep 20, 2025
Chapter 115: Magical Girl Mahiro (2)
Sep 14, 2025
Chapter 114: Minato and Yuuta (2)
Sep 06, 2025
Chapter 113: LoveMaster Momiji
Aug 30, 2025
Chapter 112: Happy Birthday, Miyo
Aug 24, 2025
Chapter 111: Kemonomimi
Aug 16, 2025
Chapter 110: Matatabi (2)
Aug 09, 2025
Chapter 109: Matatabi
Aug 03, 2025
Chapter 108: Asahi x Miyo (8)
Jul 26, 2025
Chapter 107: My (Tiny) Dress-Up Bro 2
Jul 19, 2025
Chapter 106: My (Tiny) Dress-Up Bro
Jul 12, 2025
Chapter 105: Physical Contact (5)
Jul 07, 2025
Chapter 104: Dirty Joke
Jun 29, 2025
Chapter 103: Golden Week
Jun 29, 2025
Chapter 102: 2 Girls, 1 Car (Fetish Warning)
Jun 22, 2025
Chapter 101: Immediate Sex
Jun 16, 2025
Chapter 100: MomiHiro NTR
Jun 07, 2025
Chapter 99: Bratty Mahiro
May 25, 2025
Chapter 98: Smug Momiji
May 18, 2025
Chapter 97: Jujutsu Kai-Yuri-sen
May 10, 2025
Chapter 96: Reversal Play
Apr 30, 2025
Chapter 95: EX - "Punishment"
Apr 27, 2025
Chapter 94: Pervert
Apr 27, 2025
Chapter 93: Drunk Futa (Not-so-SFW)
Apr 26, 2025
Chapter 92: Strange Behaviors
Apr 26, 2025
Chapter 91: Love Nectar (Very, VERY late Valentines)
Apr 25, 2025
Chapter 90: Overdone Incest
Apr 25, 2025
Chapter 89: Rammot Mihari
Apr 19, 2025
Chapter 88: HS - Setsubun Oni (NSFW?)
Apr 05, 2025
Chapter 87: HS - Housewife Mahiro
Mar 30, 2025
Chapter 86: Mihari x Kaede (2)
Mar 16, 2025
Chapter 85: Mihari x Kaede
Mar 01, 2025
Chapter 84: Mahiro's Research Project
Jan 18, 2025
Chapter 83: HS - Oyama Claus (2)
Jan 12, 2025
Chapter 82.5: HS - Mahiro and her Dress (2)
Jan 12, 2025
Chapter 82: Mahiro and her Dress
Jan 05, 2025
Chapter 81.8: Mahiro(♂) and Nayuta (3)
Jan 01, 2025
Chapter 81.5: Mahiro(♂) and Nayuta (2)
Dec 29, 2024
Chapter 81: Mahiro(♂) and Nayuta
Dec 28, 2024
Chapter 80.5: HS - Pocky Game (2)
Dec 27, 2024
Chapter 80: Reward
Dec 26, 2024
Chapter 79.5: Asahi x Miyo (7)
Dec 25, 2024
Chapter 79: Asahi's first kiss
Oct 31, 2024
Chapter 78: Misleading
Oct 29, 2024
Chapter 77: EX - Asahi's breast growth
Oct 24, 2024
Chapter 76.5: EX - Big brother
Oct 23, 2024
Chapter 76: Lv. 50
Oct 22, 2024
Chapter 75.5: EX - Private Lessons
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Oct 06, 2024
Chapter 75: Newlyweds
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Oct 02, 2024
Chapter 74: HP Boost
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Oct 01, 2024
Chapter 73: EX - Change of Clothes
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Sep 26, 2024
Chapter 72: EX - Shota Mahiro (2)
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Sep 21, 2024
Chapter 71: Oversized
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Sep 21, 2024
Chapter 70: Seduction (JK Gyaru Momiji ver.)
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Sep 09, 2024
Chapter 69.5: EX - Momiji in Wonderland
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Sep 04, 2024
Chapter 69: (re) Temptation
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Sep 04, 2024
Chapter 68: EX - Temptation
京都府京都市右京区嵯峨二尊院門前善光寺山町２２ Sep 03, 2024
Chapter 67: EX - Arm wrestling
Jul 08, 2024
Chapter 66: EX - Mahiro Crossdressing
Jul 07, 2024
Chapter 65: EX - Chest rub
Jul 06, 2024
Chapter 64: EX - Sadism
Jul 05, 2024
Chapter 63: EX - Asahi x Miyo | Jealousy
Jun 28, 2024
Chapter 62: EX - Angel or Devil?
Jun 21, 2024
Chapter 61: EX - Embarassing Secrets
Jun 14, 2024
Chapter 60: EX - Shota Mahiro
Jun 08, 2024
Chapter 59: EX - Mamahiro
May 31, 2024
Chapter 58: Reunion
May 24, 2024
Chapter 57: Birthday Proposal (Years Later...)
May 17, 2024
Chapter 56: EX - Magical Girl Mahiro (Tentacle Warning)
May 10, 2024
Chapter 55: Hidden Desires | Choco
May 03, 2024
Chapter 54: EX - Homemade Choco
Apr 26, 2024
Chapter 53: EX - Setsubun (NSFW Warning)
Apr 19, 2024
Chapter 52: EX - Judo Match
Apr 12, 2024
Chapter 51: Physical Contact (4)
Apr 06, 2024
Chapter 50: Weight Loss
Mar 30, 2024
Chapter 49: EX - Physical Contact (3)
Mar 22, 2024
Chapter 48: EX - New Year's Kiss
Mar 15, 2024
Chapter 47: Oyama Claus
Mar 08, 2024
Chapter 46: Christmas Date
Feb 24, 2024
Chapter 45: EX - Minato and Yuuta
Feb 17, 2024
Chapter 44: Hidden Desires | Cheerleading
Feb 09, 2024
Chapter 43: EX - Asahi x Miyo (5)
Feb 03, 2024
Chapter 42: EX - Asahi x Miyo (4)
Jan 26, 2024
Chapter 41: Nayuta's (Late) Introduction
Jan 19, 2024
Chapter 40: EX - Asahi x Miyo (3)
Jan 13, 2024
Chapter 39: EX - Romance with Amazake (Preview Ver.)
Jan 06, 2024
Chapter 38: EX - Pocky Game
Dec 15, 2023
Chapter 37: Idol Recruitment
Dec 08, 2023
Chapter 36: Trick or Treat
Dec 01, 2023
Chapter 35: Momiji's Birthday Present
Nov 24, 2023
Chapter 34: EX - AsaMiyo (Asahi x Miyo) (2)
Nov 18, 2023
Chapter 33: Hidden Desires
Nov 03, 2023
Chapter 32: Breast Growth
Oct 27, 2023
Chapter 31: EX - Mahiro and Nayuta
Oct 18, 2023
Chapter 30: A Hug from Future Sister-In-Law
Oct 10, 2023
Chapter 29: Kabedon (2)
Sep 19, 2023
Chapter 28: EX - AsaMiyo (Asahi x Miyo)
Sep 19, 2023
Chapter 27: EX - MaMiyo (Mahiro x Miyo)
Sep 15, 2023
Chapter 26: Mahiro and Yuuta
Sep 10, 2023
Chapter 25: Surprise Kiss
Sep 10, 2023
Chapter 24: EX - Tug of War
Sep 08, 2023
Chapter 23: EX - Physical Contact (2)
Sep 08, 2023
Chapter 22: Bunny Suit (+ Wolf Suit)
Sep 04, 2023
Chapter 21: What If... (2)
Sep 02, 2023
Chapter 20: Drunk Mahiro | First (Real) Kiss
Sep 01, 2023
Chapter 19: EX - Drunk Mahiro
Aug 31, 2023
Chapter 18: EX - Wild Imagination
Aug 30, 2023
Chapter 17: A Threesome
Aug 30, 2023
Chapter 16: Preparation 2
Aug 27, 2023
Chapter 15: Role Reversal | Cosplay
Aug 27, 2023
Chapter 14: Jealousy
Aug 25, 2023
Chapter 13: Cheerleading Support
Aug 25, 2023
Chapter 12: EX - Massage Practice
Aug 22, 2023
Chapter 11: EX - Birthday Proposal
Aug 22, 2023
Chapter 10: Hakama
Aug 20, 2023
Chapter 9: EX - Love Hotel
Aug 20, 2023
Chapter 8: EX - Preparation
Aug 19, 2023
Chapter 7: Future Sister-In-Law
Aug 19, 2023
Chapter 6: What If
Aug 18, 2023
Chapter 5: EX - First Kiss
Aug 18, 2023
Chapter 4: EX - Physical Contact
Aug 18, 2023
Chapter 3: Role Reversal
Aug 17, 2023
Chapter 2: Asahi's Sexual Assault
Aug 17, 2023
Chapter 1: Kabedon
Aug 16, 2023
Chapter 0: Introduction
Sep 17, 2023
Chapter 0: Character Introduction
Concrete Brick Translations Aug 31, 2023

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