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! (Source: Kodansha USA) Note: Includes 57 extra chapters.

Read If You Enjoy

Engaging pacing, distinct artwork, and worldbuilding crafted for fans of Comedy and Slice of Life.

Skip If You Prefer

Instant one-chapter resolution or light reading without an ongoing overarching storyline.

Frequently Asked Questions

Where can I read ONIMAI: I'm Now Your Sister! legally?

Official digital reading licenses vary by region. Physical and digital volumes can be found via official distributors.

How many volumes does ONIMAI: I'm Now Your Sister! have?

Volume information is updating as releases are licensed.

What is the status of ONIMAI: I'm Now Your Sister!?

ONIMAI: I'm Now Your Sister! is currently marked as ongoing.