Synopsis
No synopsis yet.
Onii-chan wa Oshimai!
2017 · ongoing
Your progress
Not in your library yet.
Score aggregate
—
Weighted across MAL / AniList / Kitsu (live aggregator ships Phase 2).
Where to watch
Provider directory ships Phase 2.
Manga ↔ anime
Reconciliation ships Phase 2.
Chapters
190- Ch 1Step 12024-09-07
- Ch 2Step 22024-09-07
- Ch 3Step 32024-09-07
- Ch 4Step 42024-09-07
- Ch 5Step 52024-09-07
- Ch 6Step 62024-09-07
- Ch 7Step 72024-09-07
- Ch 8Step 82024-09-07
- Ch 9Step 92024-09-07
- Ch 10Step 102024-09-07
- Ch 10.99Omnibus 1-2-3 Extras2023-05-17
- Ch 11Step 112024-09-07
- Ch 12Step 122024-09-07
- Ch 13Step 132024-09-07
- Ch 14Step 142024-09-07
- Ch 15Step 152024-09-07
- Ch 16Step 162024-09-07
- Ch 17Step 172024-09-07
- Ch 18Step 182024-09-07
- Ch 18.99Omnibus 4-5-6 Extras2023-05-20
- Ch 19Step 192024-09-07
- Ch 20Step 202024-09-07
- Ch 21Step 212024-09-07
- Ch 22Step 222024-09-07
- Ch 23Step 232024-09-07
- Ch 24Step 242024-09-07
- Ch 25Step 252024-09-07
- Ch 26Step 262024-09-07
- Ch 27Step 272024-09-07
- Ch 27.99Omnibus 7-8-9 Extras2023-05-25
- Ch 28Step 282024-09-07
- Ch 29Step 292024-09-07
- Ch 30Step 302024-09-07
- Ch 31Step 312024-09-07
- Ch 32Step 322024-09-07
- Ch 32.5Step 32.52024-09-07
- Ch 33Step 332024-09-07
- Ch 33.5Step 33.52024-09-07
- Ch 34Step 342024-09-07
- Ch 34.5Step 34.52024-09-07
- Ch 35Step 352024-09-07
- Ch 36Step 362024-09-07
- Ch 36.9Mahiro's Weekday Routine + Omnibus 10-11-12 Extras2023-05-25
- Ch 37Step 372024-09-07
- Ch 38Step 382024-09-07
- Ch 39Step 392024-09-07
- Ch 40Step 402024-09-07
- Ch 40.5Step 40.52024-09-07
- Ch 41Step 412024-09-07
- Ch 42Step 422024-09-07
- Ch 43Step 432024-09-07
- Ch 44Step 442024-09-07
- Ch 45Step 452024-09-07
- Ch 45.7Mahiro and Visible Undergarments2023-05-20
- Ch 45.9Omnibus 13-14-15 Extras2023-05-25
- Ch 46Step 462024-09-07
- Ch 47Step 472024-09-07
- Ch 48Step 482024-09-07
- Ch 48.5MAHIRO AND THE PARENT-TEACHER CONFERENCE2023-12-19
- Ch 49Step 492024-09-07
Show all 190 — 130 more▾
- Ch 50Step 502024-09-07
- Ch 50.5Step 50.52024-09-07
- Ch 51Step 512024-09-07
- Ch 52Step 522024-09-07
- Ch 53Step 532024-09-07
- Ch 54Step 542024-09-07
- Ch 54.5Mahiro and the serene mind2023-12-17
- Ch 54.7Mahiro and Harems2023-05-17
- Ch 54.9Omnibus 16-17-18 Extras2023-05-27
- Ch 55Step 552024-09-07
- Ch 56Step 562024-09-07
- Ch 57Step 572024-09-07
- Ch 58Step 582024-09-07
- Ch 59Step 592024-09-07
- Ch 60Step 602024-09-07
- Ch 60.5Step 60.52024-09-07
- Ch 61Step 612024-09-07
- Ch 62Step 622024-09-07
- Ch 62.1Mihari-chan's Birthday Venue2023-04-11
- Ch 62.5Nemu and Summer Vacation2023-03-22
- Ch 63Step 632024-09-07
- Ch 63.5Momiji and Panties2023-03-22
- Ch 63.99Omnibus 19-20-21 Extras2023-08-28
- Ch 64Step 642024-09-07
- Ch 65Step 652024-09-07
- Ch 66Step 662024-09-07
- Ch 66.5The Boys and Changing Shifts2023-03-22
- Ch 67Step 672024-09-07
- Ch 67.99Kaede-chan's birthday venue2023-04-11
- Ch 68Step 682024-09-07
- Ch 68.99Momiji Birthday Venue2023-04-11
- Ch 69Step 692024-09-07
- Ch 69.5Mahiro and a Moment of Glory2023-03-22
- Ch 69.99Nayutan's Birthday Venue2023-04-11
- Ch 70Step 702024-09-07
- Ch 70.7Mahiro and a Discussion on Cosplay2023-03-23
- Ch 70.8Volume 7 Extras2023-03-23
- Ch 70.9Volume 7 Special Booklet2023-04-07
- Ch 71Step 712024-09-07
- Ch 71.5Step 71.52024-09-07
- Ch 72Step 722024-09-07
- Ch 72.9The Boys Are Done For Too! + Omnibus 22-23-24 Extras2024-08-15
- Ch 73Step 732024-09-07
- Ch 73.1Mahiro-chan's Birthday Venue (2023)2023-04-11
- Ch 73.5Non-Mahiro Special: Nii-chan Edition2025-11-06
- Ch 74Step 742024-09-07
- Ch 74.1Blu-Ray Box Volume 1 Add-in Comic2023-04-20
- Ch 74.5Step 74.52024-09-07
- Ch 74.99Mihari's Birthday Venue2023-04-21
- Ch 75Step 752024-09-07
- Ch 76Step 762024-09-07
- Ch 76.1Blu-Ray Box Volume 2 Add-in Comic2023-06-22
- Ch 76.9The Research Lab's Mihari-chan2023-06-04
- Ch 77Step 772024-09-07
- Ch 78Step 782024-09-07
- Ch 78.5Step 78.52024-09-07
- Ch 78.9Mihari's Research Lab2023-08-15
- Ch 79Step 792024-09-07
- Ch 80Step 802024-09-07
- Ch 80.5Step 80.52024-09-07
- Ch 80.8Mahiro and the Growing Gal Gang + Volume 8 Extras2023-12-09
- Ch 81Step 812025-05-17
- Ch 81.5Step 81.52025-05-17
- Ch 81.8Non-Mahiro Special: Aoi-chan Edition2025-11-04
- Ch 81.9Minato-kun is Done For? (Preview Version)2023-11-11
- Ch 82Step 822025-05-17
- Ch 82.5Step 82.52025-05-17
- Ch 83Step 832025-05-17
- Ch 83.9Minato-kun is Done For? (Full Version)2024-01-06
- Ch 84Step 842025-05-17
- Ch 85Step 852025-05-17
- Ch 85.5Step 85.52025-05-17
- Ch 85.6A MEETING OF MOTHERS+ Omnibus 28-29-30 Extras2026-09-24
- Ch 86Step 862025-05-17
- Ch 86.5Special: Asahi's Birthday2024-09-20
- Ch 86.9Minato-kun is Done For? 1.52024-04-10
- Ch 87Step 872025-05-17
- Ch 88Step 882025-05-17
- Ch 88.5untitled2024-08-16
- Ch 89Step 892025-05-17
- Ch 90Step 902025-05-17
- Ch 90.5Step 90.52025-05-17
- Ch 90.8Mahiro and Mama (Revisited)2024-10-19
- Ch 90.9Volume 9 Special Edition Extras2024-10-19
- Ch 91Step 912026-07-03
- Ch 91.5Nemu and Nodoka2025-01-11
- Ch 92Step 922026-07-03
- Ch 92.5Asahi and Growth2025-01-11
- Ch 93Step 932026-07-03
- Ch 93.5The Boys and Another Shot2025-01-11
- Ch 94Step 942026-07-03
- Ch 95Step 952026-07-03
- Ch 95.5Miyo and the Date2025-03-01
- Ch 95.9Minato-kun is Done For? 22025-01-01
- Ch 96Step 962026-07-03
- Ch 97Step 972026-07-03
- Ch 98Step 982026-07-03
- Ch 98.5Mahiro and Being a Small Fry Human2025-07-08
- Ch 99Step 992026-07-03
- Ch 99.5Mahiro and Getting a License + Doujin Issue 33 Extras2025-07-08
- Ch 100Step 1002026-07-03
- Ch 100.5MAHIRO AND THE CAT ARMY......2026-05-30
- Ch 100.9Onii-chan's Drawing Book2025-11-01
- Ch 101Mahiro and a Celebration2025-06-27
- Ch 101.5MAHIRO AND THE FEMALE CHARACTERS2026-04-10
- Ch 102Mahiro and a Technological Nightmare2025-07-25
- Ch 102.1Niichi-chan Edition2025-10-31
- Ch 102.2Aoi-chan Edition2025-10-31
- Ch 103Mahiro and Heaven or Hell2025-08-30
- Ch 104Mahiro and Mother's Day2025-09-26
- Ch 104.5MAHIRO AND THE MOTHERLY EMBRACE2026-04-10
- Ch 105Mahiro and an Offline Adventure2025-10-24
- Ch 106Mahiro and Sharing Secrets2025-11-29
- Ch 107Mahiro and Popularity Rankings2025-12-27
- Ch 107.5MAHIRO AND THE MAKEOVER2026-04-10
- Ch 107.9Minato-kun is Done For? 32026-01-10
- Ch 108Mahiro and Bodyguards2026-01-31
- Ch 108.5A DATE WITH NEMU2026-04-10
- Ch 109Mahiro and a Healthy Beauty Regimen2026-02-27
- Ch 110Mahiro and the Demon of the Prefect Council2026-03-27
- Ch 110.6Special booklet for Volume 112026-09-15
- Ch 110.7EGG FIRM 10TH ANNIVERSARY BOOK2026-09-15
- Ch 111Mahiro and the Fun-filled Lion's Den2026-04-24
- Ch 111.5MAHIRO AND THE SECOND ROUND2026-08-28
- Ch 112Mahiro and Gender Topsy-Turvy2026-05-29
- Ch 112.5MAHIRO AND THE SUCCUBUS DRESS2026-08-28
- Ch 113Mahiro and the Ecological Research Duo2026-06-26
- Ch 114Mahiro and the Cosplay Photoshoot2026-07-24
- Ch 115Mahiro and the Joys of Creation2026-08-28
- Ch 116Mahiro and the Parent-Teacher Conference2026-09-25
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