Onii-chan wa Oshimai! ONIMAI: I'm Now Your Sister!

También conocida como: ONIMAI: I'm Now Your Sister! · お兄ちゃんはおしまい！ · Onii-chan is Done For! · Onii-chan ha Oshimai! · Ab sofort Schwester! · 오빠는 끝! · ONIMAI: I’m Now Your Sister! · Onii-chan Is Done For · Onii-chan Is Done For! · ONIMAI - I'm Now Your Sister! · Мой братик теперь не братик! · Мій братик вже не братик · 不当哥哥了！ · 别当欧尼酱了！

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!