ONIMAI - I'm Now Your Sister! cover

ONIMAI - I'm Now Your Sister!

Author
Nekotoufu
Type
Manga
Status
Ongoing
Year
2017
Genres and tags
Comedy Gender Bender Sci-fi Seinen Slice of Life Ecchi Shounen School Life Yuri Doujinshi Gender Bending Cute Girls Doing Cute Things Iyashikei Primarily Female Cast LGBTQ+ Themes Rehabilitation Transgender School Female Protagonist Hikikomori Age Regression Crossdressing Bisexual

Description

Mahiro Oyama was just a normal erotic-game loving dude…until he woke up one morning as a woman! Turns out his mad-scientist little sister, Mihari, tried out one of her new experiments on him…with a disastrous outcome, as far as Mahiro’s concerned! But Mihari is as determined to study him as he is determined to go back to his shut-in, game-playing life, and one thing’s for sure…life is going to get a whole lot weirder from here on out!

Alternative titles

Chapters (251)

  1. Chapter 116: Mahiro and the Parent-Teacher Conference
  2. Chapter 115: Mahiro and the Joys of CreationVol. 115
  3. Chapter 114: Mahiro and the Cosplay Photoshoot
  4. Chapter 113: Mahiro and the Ecological Research Duo
  5. Chapter 112.5: MAHIRO AND THE SUCCUBUS DRESS
  6. Chapter 112: Mahiro and Gender Topsy-Turvy
  7. Chapter 111.5: MAHIRO AND THE SECOND ROUND
  8. Chapter 111: Mahiro and the Fun-filled Lion's Den
  9. Chapter 110.7: EGG FIRM 10TH ANNIVERSARY BOOK
  10. Chapter 110.6: Special booklet for Volume 11
  11. Chapter 110.5: MAHIRO AND THE AWARDS CEREMONY
  12. Chapter 110: Mahiro and the Demon of the Prefect CouncilVol. 11
  13. Chapter 109: Mahiro and a Healthy Beauty RegimenVol. 11
  14. Chapter 108.5: A DATE WITH NEMU
  15. Chapter 108: Mahiro and Bodyguards
  16. Chapter 107.9: Minato-kun is Done For? 3
  17. Chapter 107.5: MAHIRO AND THE MAKEOVER
  18. Chapter 107: Mahiro and Popularity Rankings
  19. Chapter 106: Mahiro and Sharing Secrets
  20. Chapter 105: Mahiro and an Offline Adventure
  21. Chapter 104.5: MAHIRO AND THE MOTHERLY EMBRACE
  22. Chapter 104: Mahiro and Mother's Day
  23. Chapter 103: Mahiro and Heaven or Hell
  24. Chapter 102.2: Aoi-chan Edition
  25. Chapter 102.1: Niichi-chan Edition
  26. Chapter 102: Mahiro and a Technological Nightmare
  27. Chapter 101.5: MAHIRO AND THE FEMALE CHARACTERS
  28. Chapter 101: Mahiro and a Celebration
  29. Chapter 100.9: Onii-chan's Drawing BookVol. 10
  30. Chapter 100.5 - Volume 10Vol. 10
  31. Step 100Vol. 10
  32. Chapter 99.5 - Volume 10Vol. 10
  33. Step 99Vol. 10
  34. Chapter 98.5 - Volume 10Vol. 10
  35. Step 98Vol. 10
  36. Step 97Vol. 10
  37. Step 96Vol. 10
  38. Chapter 95.9: Minato-kun is Done For? 2Vol. 10
  39. Chapter 95.5 - Volume 10Vol. 10
  40. Step 95Vol. 10
  41. Step 94Vol. 10
  42. Chapter 93.5 - Volume 10Vol. 10
  43. Step 93Vol. 10
  44. Chapter 92.5 - Volume 10Vol. 10
  45. Step 92Vol. 10
  46. Chapter 91.5 - Volume 10Vol. 10
  47. Step 91Vol. 10
  48. Chapter 90.9: Volume 9 Special Edition ExtrasVol. 9
  49. Chapter 90.8: Mahiro and Mama (Revisited)Vol. 9
  50. Chapter 90.6 - Volume 9Vol. 9
  51. Step 90.5Vol. 9
  52. Step 90Vol. 9
  53. Step 89Vol. 9
  54. Chapter 88.5 - Volume 9Vol. 9
  55. Step 88Vol. 9
  56. Step 87Vol. 9
  57. Chapter 86.9: Minato-kun is Done For? 1.5Vol. 9
  58. Chapter 86.5: Special: Asahi's BirthdayVol. 9
  59. Step 86Vol. 9
  60. Chapter 85.6: A MEETING OF MOTHERS+ Omnibus 28-29-30 ExtrasVol. 9
  61. Step 85.5Vol. 9
  62. Step 85Vol. 9
  63. Step 84Vol. 9
  64. Chapter 83.9: Minato-kun is Done For? (Full Version)Vol. 9
  65. Step 83Vol. 9
  66. Step 82.5Vol. 9
  67. Step 82Vol. 9
  68. Chapter 81.9: Minato-kun is Done For? (Preview Version)Vol. 9
  69. Chapter 81.8: Non-Mahiro Special: Aoi-chan EditionVol. 9
  70. Step 81.5Vol. 9
  71. Step 81Vol. 9
  72. Chapter 80.8: Mahiro and the Growing Gal Gang + Volume 8 ExtrasVol. 8
  73. Chapter 80.6 - Volume 9Vol. 9
  74. Step 80.5Vol. 8
  75. Step 80Vol. 8
  76. Step 79Vol. 8
  77. Chapter 78.9: Mihari's Research LabVol. 8
  78. Step 78.5Vol. 8
  79. Step 78Vol. 8
  80. Step 77Vol. 8
  81. Chapter 76.9: The Research Lab's Mihari-chanVol. 8
  82. Chapter 76.1: Blu-Ray Box Volume 2 Add-in ComicVol. 8
  83. Step 76Vol. 8
  84. Step 75Vol. 8
  85. Chapter 74.99: Mihari's Birthday VenueVol. 8
  86. Step 74.5Vol. 8
  87. Chapter 74.1: Blu-Ray Box Volume 1 Add-in ComicVol. 8
  88. Step 74Vol. 8
  89. Chapter 73.5: Non-Mahiro Special: Nii-chan EditionVol. 8
  90. Chapter 73.1: Mahiro-chan's Birthday Venue (2023)Vol. 8
  91. Step 73Vol. 8
  92. Chapter 72.9: The Boys Are Done For Too! + Omnibus 22-23-24 ExtrasVol. 8
  93. Step 72Vol. 8
  94. Step 71.5Vol. 8
  95. Step 71Vol. 8
  96. Chapter 70.9: Volume 7 Special BookletVol. 7
  97. Chapter 70.8: Volume 7 ExtrasVol. 7
  98. Chapter 70.7: Mahiro and a Discussion on CosplayVol. 7
  99. Chapter 70.5 - Volume 7Vol. 7
  100. Step 70Vol. 7

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