ONIMAI - I'm Now Your Sister! cover

ONIMAI - I'm Now Your Sister! — STEP 56.5 PART 1: NAYUTA'S SWIMSUIT / STEP 56.5 PART 2: KAEDE AND THE JUNIOR HIGH GIRLS / STEP 57 MAHIRO'S BEACH FUN (PART ONE)

21 pages, from Official, released Apr 4, 2026.

Volume 6

ONIMAI - I'm Now Your Sister!

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!

Chapters (306)

  1. Chapter 70.7: Mahiro and a Discussion on CosplayVol. 7
  2. Chapter 70.5 - Volume 7Vol. 7
  3. Step 70Vol. 7
  4. Chapter 69.99: Nayutan's Birthday VenueVol. 7
  5. Chapter 69.5 - Volume 7Vol. 7
  6. Step 69Vol. 7
  7. Chapter 68.99: Momiji Birthday VenueVol. 7
  8. Step 68Vol. 7
  9. Chapter 67.99: Kaede-chan's birthday venueVol. 7
  10. Step 67Vol. 7
  11. Chapter 66.5 - Volume 7Vol. 7
  12. Step 66Vol. 7
  13. Step 65Vol. 7
  14. Step 64Vol. 7
  15. Chapter 63.99: Omnibus 19-20-21 ExtrasVol. 7
  16. Chapter 63.5 - Volume 7Vol. 7
  17. Step 63Vol. 7
  18. Chapter 62.5 - Volume 7Vol. 7
  19. Chapter 62.1: Mihari-chan's Birthday VenueVol. 7
  20. Step 62Vol. 7
  21. Step 61Vol. 7
  22. Chapter 60.6 - Volume 7Vol. 7
  23. STEP 60 MAHIRO'S SUMMER HOMEWORK / BONUS MAHIRO AND THE PHOTO ALBUMS / AFTERWORDVol. 6
  24. SPECIAL MAHIRO'S COLORFUL LIFE / STEP 51 MAHIRO AND THE RAINY SEASONVol. 6
  25. Volume 6Vol. 6
  26. Step 60.5Vol. 6
  27. Chapter 60Vol. 7
  28. Chapter 60Vol. 6
  29. Step 59Vol. 6
  30. Chapter 58.5 - Volume 6Vol. 6
  31. STEP 70 MAHIRO'S AUTUMN OUTING / BONUS MAHIRO'S COSPLAY ROUND-TABLEVol. 7
  32. Step 58Vol. 6
  33. STEP 69 MAHIRO'S FIELD DAY / STEP 69.5 MAHIRO'S CHEER WEARVol. 7
  34. Step 57Vol. 6
  35. STEP 68 MAHIRO AND THE FAN WORLDVol. 7
  36. Step 56Vol. 6
  37. STEP 67 MAHIRO'S MASCULINE EGOVol. 7
  38. Step 55Vol. 6
  39. Chapter 54.9: Omnibus 16-17-18 ExtrasVol. 6
  40. Chapter 54.7: Mahiro and HaremsVol. 6
  41. Chapter 54.5 - Volume 6Vol. 6
  42. STEP 66 MAHIRO AND THE CHARMING SCHOOL FESTIVAL (PART 2) / STEP 66.5 THE BOYS' SHIFT CHANGEVol. 7
  43. Step 54Vol. 6
  44. Chapter 53.5 - Volume 6Vol. 6
  45. STEP 65 MAHIRO AND THE CHARMING SCHOOL FESTIVAL (PART 1)Vol. 7
  46. Step 53Vol. 6
  47. STEP 64 MAHIRO'S WEIGHT-LOSS PLANVol. 7
  48. Step 52Vol. 6
  49. Chapter 51.5 - Volume 6Vol. 6
  50. STEP 63 MAHIRO SHELTERS FROM THE STORM / STEP 63.5 MOMIJI'S PANTY PROBLEMVol. 7
  51. Step 51Vol. 6
  52. Chapter 50.7 - Volume 6Vol. 6
  53. STEP 50.5 MAHIRO AND THE COMRADE'S RETURN AGAIN / BONUS NAYUTA'S RECENT PAST / AFTERWORDVol. 5
  54. Volume 5Vol. 5
  55. Chapter 50.6 - Volume 5Vol. 5
  56. Step 50.5Vol. 5
  57. Chapter 50Vol. 6
  58. Chapter 50Vol. 5
  59. STEP 62 MAHIRO'S SECOND SEMESTER DEBUT / STEP 62.5 NEMU'S SUMMER VACATIONVol. 7
  60. Step 49Vol. 5
  61. Chapter 48.5 - Volume 5Vol. 5
  62. Step 48Vol. 5
  63. Chapter 47.5 - Volume 5Vol. 5
  64. STEP 59 MAHIRO'S DEEP CLEANVol. 6
  65. Step 47Vol. 5
  66. Chapter 46.5 - Volume 5Vol. 5
  67. STEP 58 MAHIRO'S BEACH FUN (PART TWO) / STEP 58.5 MAHIRO AND THE SQUISHY THINGIEVol. 6
  68. Step 46Vol. 5
  69. Chapter 45.9: Omnibus 13-14-15 ExtrasVol. 5
  70. Chapter 45.7: Mahiro and Visible UndergarmentsVol. 5
  71. STEP 56.5 PART 1: NAYUTA'S SWIMSUIT / STEP 56.5 PART 2: KAEDE AND THE JUNIOR HIGH GIRLS / STEP 57 MAHIRO'S BEACH FUN (PART ONE)Vol. 6
  72. Step 45Vol. 5
  73. STEP 55 MAHIRO AND THE MIDSUMMER ROMANCE / STEP 56 MAHIRO AND THE STRATEGY MEETINGVol. 6
  74. Step 44Vol. 5
  75. Chapter 43.5 - Volume 5Vol. 5
  76. STEP 54 MAHIRO AND THE AFTER-SCHOOL FRIGHT / STEP 54.5 MAHIRO'S COOL HEADVol. 6
  77. Step 43Vol. 5
  78. Chapter 42.6: EX3 Special - Mahiro and a Hair's Breadth from Danger!Vol. 5
  79. Chapter 42.5 - Volume 5Vol. 5
  80. STEP 53 MAHIRO, THE SUN, AND THE NORTHERN WIND / STEP 53.5 GIRLS AND BOYSVol. 6
  81. Step 42Vol. 5
  82. Chapter 41.7 - Volume 5Vol. 5
  83. Chapter 41.3 - Volume 5Vol. 5
  84. STEP 51.5 MAHIRO AND SELF-STYLING / STEP 52 MAHIRO AND THE LITTLE GARDENVol. 6
  85. Step 41Vol. 5
  86. STEP 40.5 MAHIRO'S BARE FEET / BONUS MIHARI'S SKIPPED GRADES / AFTERWORDVol. 4
  87. Volume 4Vol. 4
  88. Chapter 40.99: Bonus IllustrationVol. 4
  89. Chapter 40.8Vol. 4
  90. Chapter 40.6 - Volume 4Vol. 4
  91. Step 40.5Vol. 4
  92. Step 40Vol. 4
  93. Step 39Vol. 4
  94. Chapter 38.5 - Volume 4Vol. 4
  95. STEP 49 MAHIRO AND SWIM CLASS (PART 1) / STEP 50 MAHIRO AND SWIM CLASS (PART 2)Vol. 5
  96. Step 38Vol. 4
  97. Chapter 37.5 - Volume 4Vol. 4
  98. STEP 48 MAHIRO AND VISITATION DAY STEP 48.5 MAHIRO AND THE PARENT-TEACHER CONFERENCEVol. 5
  99. Step 37Vol. 4
  100. Chapter 36.9: Mahiro's Weekday Routine + Omnibus 10-11-12 ExtrasVol. 4

More from these authors

Related titles

Popular in these genres