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! *5th place of Tsugi Manga Awards, Category Webmanga - **Retail:** (Direct Retail From the Mangaka)  [Official Melon Books](https://www.melonbooks.co.jp/circle/index.php?circle_id=3753)  [Official Toranoana](https://ec.toranoana.shop/tora/ec/cot/circle/2UPA116P847KdC6Rd687/all/)  [Official DLSite](https://www.dlsite.com/home/circle/profile/=/maker_id/RG40614.html) (jp)
Genres
Information
Stats
Track
Alternative Titles
Onimai: I'm Now Your Sister!
Chapters
Ch. 1
Mahiro and the Unpleasurable Body
Ch. 1.5
Mahiro and the Toilet
Ch. 2
Mahiro and the Dangerous Mirror
Ch. 3
Mahiro and Identity
Ch. 4
Mahiro and MMORPG
Ch. 5
Mahiro and a Melancholic Day
Ch. 5.5
Mahiro and Comfort for Many Days
Ch. 6
Mahiro and the Secret Garden
Ch. 6.5
Mahiro and Going in Circles
Ch. 7
Mahiro and Encounters with the Unknown
Ch. 8
Mahiro and New Game
Ch. 8.5
Mahiro and Gacha (v2)
Ch. 9
Mahiro and a Girl's Vacation
Ch. 9.5
Mahiro and the Two's Secret
Ch. 10
Mahiro and Special Home Security
Ch. 10.5
Mahiro and Helping Out & OMAKE - Mihari and Onii-chan
Ch. 10.9
Chapter 1-10 Mini Extras
Ch. 10.99
Omnibus 1-2-3 Extras