All Chapters
Chapter 93
Chapter 92
Chapter 91
Chapter 90
Onii-chan, Return to Us!
Chapter 90
Chapter 89
Momiji The Mentalist
Chapter 89
Chapter 88
Mahiro and The Headband
Chapter 88
Chapter 87
Mother, My Savior
Chapter 87
Chapter 86
Mahiro and the Nocturnal Classmate
Chapter 86
Chapter 85
Mahiro's 8-Hour Timelapse Recording
Chapter 85
Chapter 84
Mahiro and Three Different Doses
Chapter 84
Chapter 83
Mahiro and Dieting! (Again)
Chapter 83
Chapter 82
Mahiro and the Mysterious Drink
Chapter 82
Chapter 81
Mahiro and Compensation
Chapter 81
Chapter 80
Mahiro and Phantom Pain
Chapter 80
Chapter 79
That Cow's Done For!
Chapter 79
Chapter 78
Mahiro, Nemu, and Finding Nemu
Chapter 78
Chapter 77
Self-Restraint★
Chapter 77
Chapter 76
Done For via Girliness Checkers
Chapter 76
Chapter 75
Mahiro, Mihari, and Horror Movies
Chapter 75
Chapter 74
Mahiro and Foreheads
Chapter 74
Chapter 73
Mahiro and Dark-skinned Gyarus
Chapter 73
Chapter 72
Mahiro and a Faint Glimmer of Hope
Chapter 72
Chapter 71
Momiji and the O(π) Report
Chapter 71
Chapter 70
Mahiro and Massages
Chapter 70
Chapter 69
The Boys Are Done for In-Game
Chapter 69
Chapter 68
Transform! PuniCura!
Chapter 68
Chapter 67
Everyone's Gonna Be Done For
Chapter 67
Chapter 66
Mahiro and Suspicions
Chapter 66
Chapter 65
Mahiro is a Man-Eater?
Chapter 65
Chapter 64
Watch★Yourself!
Chapter 64
Chapter 63
Onii-chan's Weaning is Done For
Chapter 63
Chapter 62
Mahiro and Family Jewels
Chapter 62
Chapter 61
Mahiro and a Special Delivery
Chapter 61
Chapter 60
Onii-chan Might Be a Boy
Chapter 60
Chapter 59
Mahiro and Ojou-samas
Chapter 59
Chapter 58
Mahiro and Pregnancy
Chapter 58
Chapter 57
Mahiro and Wedding Papers
Chapter 57
Chapter 56
Mahiro and Karaoke
Chapter 56
Chapter 55
Mahiro and Profile Sheets
Chapter 55
Chapter 54
Weak Against Mahiro!
Chapter 54
Chapter 53
Yuuta-kun and Minato-kun! The Truth Revealed!
Chapter 53
Chapter 52
Mihari-chan's Big Makeover
Chapter 52
Chapter 51
Mahiro and a Peculiar Head
Chapter 51
Chapter 50
Mahiro and Maid Etiquette
Chapter 50
Chapter 49
Sealed Away!
Chapter 49
Chapter 48
Onii-chan's Muscles Are Done For
Chapter 48
Chapter 47
Whisper! Mihari-chan
Chapter 47
Chapter 46
Babysitter
Chapter 46
Chapter 45
Mahiro and Ballet Class
Chapter 45
Chapter 44
Mahiro and the Lottery
Chapter 44
Chapter 43
Mahiro and the Complete Set
Chapter 43
Chapter 42
Onii-chan Energy
Chapter 42
Chapter 41
Mahiro and a Good Night's Rest
Chapter 41
Chapter 40
Mahiro, Nayuta, and Transforming Heroines
Chapter 40
Chapter 39
Onii-chan Wants to Return!
Chapter 39
Chapter 38
Mihari's Placebo
Chapter 38
Chapter 37
Mahiro and Clinginess
Chapter 37
Chapter 36
Mahiro and Schrödinger's Nayuta
Chapter 36
Chapter 35
Mahiro Standing Proud
Chapter 35
Chapter 34
Mahiro and Asahi
Chapter 34
Chapter 33
Rain With a Chance of Brother
Chapter 33
Chapter 32
Onii-chan's shoulders are done for!
Chapter 32
Chapter 31
Midsummer Adventure
Chapter 31
Chapter 30
Momiji's massive transformation
Chapter 30
Chapter 29
Mahiro is in big trouble
Chapter 29
Chapter 28
Mihari ♂
Chapter 28
Chapter 27
Mahiro is a Little Girl
Chapter 27
Chapter 26
Enough Reincarnation
Chapter 26
Chapter 25
Mahiro and fluffiness
Chapter 25
Chapter 24
Mahiro and the Typhoon
Chapter 24
Chapter 23
Mahiro and Kaede gets wet in the rain
Chapter 23
Chapter 22
Mahiro and all the other "Mahiro"s
Chapter 22
Chapter 21
Onii-chan wants to find it
Chapter 21
Chapter 20
Mahiro and the game world
Chapter 20
Chapter 19
THE medicine
Chapter 19
Chapter 18
Mahiro and the Nobel show
Chapter 18
Chapter 17
No Ahoge No Life
Chapter 17
Chapter 16
Mahiro returns a favor
Chapter 16
Chapter 15
Mahiro and the Established Norm
Chapter 15
Chapter 14
Mahiro and the Way of Men
Chapter 14
Chapter 13
Mahiro and the Love Letter
Chapter 13
Chapter 12
Mihari and her Partner
Chapter 12
Chapter 11
Mahiro and the Terrifying Sealed Room
Chapter 11
Chapter 10
Mahiro and the Imaginary
Chapter 10
Chapter 9
Mahiro and Mahiri
Chapter 9
Chapter 8
An Unforgettable Sensation
Chapter 8
Chapter 7
I wanna dress Oyama Mahiro up!
Chapter 7
Chapter 6
A letter for you
Chapter 6
Chapter 5
Secret Handsign
Chapter 5
Chapter 4
Mahiro and Observing Progress
Chapter 4
Chapter 3
Mahiro and Minority
Chapter 3
Chapter 2
Onii-chan Wants to Give Birth!?
Chapter 2
Chapter 1
Triple★Push!
Chapter 1
About Onii-chan wa Oshimai! Koushiki Anthology Comic
An anthology comic of Onii-chan wa Oshimai! by various mangaka. **Volume 1** **Cover**: [Namori](https://mangadex.org/author/f049cee3-3b14-4101-8e5d-813526abb1f6) **Illustrations**: [Hara… Read full synopsis →
Updated Apr 03, 2026•Ongoing
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