Cover of the Onii-chan wa Oshimai

Onii-chan wa Oshimai

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Mahiro Oyama was an ordinary guy who had an interest in erotic games. However, his life took a sudden turn when he woke up as a female one morning. His younger sister Mihari had used him in one of her scientific experiments, which had a catastrophic effect on Mahiro. Despite his desire to return to his previous lifestyle of playing games and remaining indoors, Mihari was determined to study him, and things were bound to get even more bizarre from here on out.

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Type

Manga

Genre

Published

September 28, 2024

Updated

July 31, 2025

Onii-chan wa Oshimai Episodes

Start to Chapter 1

First Chapter

Chapter 1

Read Now

Latest Chapter

Chapter 102

Read Now

Chapter 102

July 26, 2025

Chapter 101

June 28, 2025

Chapter 100

May 31, 2025

Chapter 99

April 26, 2025

Chapter 98

March 29, 2025

Chapter 97

February 22, 2025

Chapter 96

January 25, 2025

Chapter 95.9

January 1, 2025

Chapter 95.5

March 29, 2025

Chapter 95

January 1, 2025

Chapter 94

November 30, 2024

Chapter 93.5

January 25, 2025

Chapter 93

October 29, 2024

Chapter 92

September 28, 2024

Chapter 91.5

January 25, 2025

Chapter 91

September 28, 2024

Chapter 90.9

October 29, 2024

Chapter 90.8

October 29, 2024

Chapter 90.5

September 28, 2024

Chapter 90

September 28, 2024

Chapter 89

September 28, 2024

Chapter 88

September 28, 2024

Chapter 87

September 28, 2024

Chapter 86.9

September 28, 2024

Chapter 86.5

September 28, 2024

Chapter 86

September 28, 2024

Chapter 85.5

September 28, 2024

Chapter 85

September 28, 2024

Chapter 84

September 28, 2024

Chapter 83.9

September 28, 2024

Chapter 83

September 28, 2024

Chapter 82.5

September 28, 2024

Chapter 82

September 28, 2024

Chapter 81.9

September 28, 2024

Chapter 81.5

September 28, 2024

Chapter 81

September 28, 2024

Chapter 80.8

September 28, 2024

Chapter 80.5

September 28, 2024

Chapter 80

September 28, 2024

Chapter 79

September 28, 2024

Chapter 78.9

September 28, 2024

Chapter 78.5

September 28, 2024

Chapter 78

September 28, 2024

Chapter 77

September 28, 2024

Chapter 76.9

September 28, 2024

Chapter 76.1

September 28, 2024

Chapter 76

September 28, 2024

Chapter 75

September 28, 2024

Chapter 74.5

September 28, 2024

Chapter 74.1

September 28, 2024

Chapter 74

September 28, 2024

Chapter 73

September 28, 2024

Chapter 72.9

September 28, 2024

Chapter 72

September 28, 2024

Chapter 71.5

September 28, 2024

Chapter 71

September 28, 2024

Chapter 70.5

April 24, 2025

Chapter 70

September 28, 2024

Chapter 69

September 28, 2024

Chapter 68

September 28, 2024

Chapter 67

September 28, 2024

Chapter 66

September 28, 2024

Chapter 65

September 28, 2024

Chapter 64

September 28, 2024

Chapter 63

September 28, 2024

Chapter 62

September 28, 2024

Chapter 61

September 28, 2024

Chapter 60.5

September 28, 2024

Chapter 60

September 28, 2024

Chapter 59

September 28, 2024

Chapter 58

September 28, 2024

Chapter 57

September 28, 2024

Chapter 56

September 28, 2024

Chapter 55

September 28, 2024

Chapter 54

September 28, 2024

Chapter 53

September 28, 2024

Chapter 52

September 28, 2024

Chapter 51

September 28, 2024

Chapter 50.5

April 24, 2025

Chapter 50.1

September 28, 2024

Chapter 50

September 28, 2024

Chapter 49

September 28, 2024

Chapter 48

September 28, 2024

Chapter 47

September 28, 2024

Chapter 46

September 28, 2024

Chapter 45

September 28, 2024

Chapter 44

September 28, 2024

Chapter 43

September 28, 2024

Chapter 42

September 28, 2024

Chapter 41

September 28, 2024

Chapter 40.5

September 28, 2024

Chapter 40

September 28, 2024

Chapter 39

September 28, 2024

Chapter 38

September 28, 2024

Chapter 37

September 28, 2024

Chapter 36

September 28, 2024

Chapter 35

September 28, 2024

Chapter 34

September 28, 2024

Chapter 33

September 28, 2024

Chapter 32

September 28, 2024

Chapter 31

September 28, 2024

Chapter 30.5

September 28, 2024

Chapter 30

September 28, 2024

Chapter 29

September 28, 2024

Chapter 28

September 28, 2024

Chapter 27

September 28, 2024

Chapter 26

September 28, 2024

Chapter 25

September 28, 2024

Chapter 24

September 28, 2024

Chapter 23

September 28, 2024

Chapter 22

September 28, 2024

Chapter 21

September 28, 2024

Chapter 20.5

September 28, 2024

Chapter 20

September 28, 2024

Chapter 19

September 28, 2024

Chapter 18

September 28, 2024

Chapter 17

September 28, 2024

Chapter 16

September 28, 2024

Chapter 15

September 28, 2024

Chapter 14

September 28, 2024

Chapter 13

September 28, 2024

Chapter 12

September 28, 2024

Chapter 11

September 28, 2024

Chapter 10.5

September 28, 2024

Chapter 10

September 28, 2024

Chapter 9

September 28, 2024

Chapter 8

September 28, 2024

Chapter 7

September 28, 2024

Chapter 6

September 28, 2024

Chapter 5

September 28, 2024

Chapter 4

September 28, 2024

Chapter 3

September 28, 2024

Chapter 2

September 28, 2024

Chapter 1

September 28, 2024

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