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!

One day, loser shut-in Mahiro was suddenly transformed into a girl by his little sister Mihari, and now he's forced to adjust to his new life as a she! Mahiro explores the new-to-her worlds of the hair salon, the girls' side of the arcade... and even what it feels like to have a crush on another girl?! Can she really hold on to her desire to return to manhood in the face of her new and exciting female life?! This collected edition of the popular gender-bending webcomic will have you rolling with laughter and squealing with delight at this brother-turned-beauty's antics!

Former shut-in Mahiro Oyama was transformed into a girl thanks to his little sister Mihari's experimental drug... and he's starting to like it! But his independent lifestyle is ruined when Mihari enrolls him in middle school! Can Mahiro survive middle school for a second time—and as a girl, to boot?! The brother-turned-beauty's schoolgirl life begins here!

お兄ちゃん、身も心もJCに!? 怪しい薬で女の子になってしまった元引きこもりの青年・緒山真尋。 JCとしての生活にも慣れてきて、バレンタインや占いブーム、 お洒落といったガーリーなものにも興味津々の様子。 そんな中、まひろの正体を知るクラスメイトが現れ、またもや大ピンチ!?

This brother has girl power of monstrous proportions! Former twenty-something shut-in Mahiro Oyama was transformed into a girl by an experimental drug, and now he's celebrating birthdays, buying bras, and even turning heads as his exploration of how the other side lives continues! But when the drug starts to lose effectiveness during swim class, can he get to safety without anyone noticing he's not really a she?! The brother-turned-beauty's schoolgirl life faces its greatest crisis yet!

It's his first summer break as a schoolgirl! Former twenty-something shut-in Mahiro Oyama was transformed into a girl by an experimental drug, and every day he's getting closer to being the model citizen his sister hoped to create! From late spring cleaning to early summer homework, gardening to junior high relationships, he can handle it all…but can he survive a trip to the beach with the girls?

ひょんなことから女子中学生になってしまった 元引きこもりの青年・緒山真尋。 人生2度目の中学2年生の夏休みも楽しく過ごし、 文化祭や体育祭の学校行事もなんだかんだで満喫。 友達や近寄りづらかったクラスのギャル、 穏やかな担任の先生の別の側面も見つけちゃったりして なんでもない日常がどんどん面白くてにぎやかに。 お兄ちゃんの青春は今日も順風満帆!!

謎の薬の効果で女子中学生になってしまった元自宅警備員の緒山真尋。 それでも順調にJC生活を満喫していたところに、 海外出張中の母親が突然の帰宅で親バレの危機⁉ みよちゃんに新しい出会いがあったり なゆた家の初訪問で絆を深めたり、 そしてかえでの大学受験など ゆっくりながらもみんなの成長を感じる第9巻。