Title: ONIMAI
Subtitle: I'm Now Your Sister! Volume 1
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! (Source: [Kodansha USA](https://kodansha.us/product/onimai-im-now-your-sister-1/)).
Subjects: Comedy, Slice of Life, Manga, Shojo, Science fiction, Seinen, gender bender, family