One day Megumi saves a strange man. In return, Megumi receives a magical book. After accidentally bleeding on the book, a genie named Pierrot appears and offers to grant him a wish. Megumi wishes to become a strong man's man. Pierrot, a trickster, inadvertently turns Megumi into a woman.

While Megumi is physically a very attractive girl, she still retains her masculine mannerisms and fighting abilities, which she uses very often, attracting the 'Megu-chan Protection Club', a group of misfit admirers. Nobody else knows she used to be a boy but was transformed into a girl; initially only Megumi's best friend, Miki, knew her secret, however the protection club quickly finds out.

A tomboy at heart, if she unintentionally displays any sort of affection for anyone, she is very quick to deny everything.

(Source: Wikipedia)

Megumi-chan is a girl with a secret past. She used to be a boy until she met a person she thought was a magic user. This person gave him/her a magical book from which a genie appears to grant one wish when blood is applied to it. Megumi made the wish to be a man in a man's body but the genie has a twist: he grants wishes backwards so he turns Megumi-kun aged 9 to Megumi-chan. Years pass and Megumi enters High School where she immediately beats up the school bully who of course falls in love with her. She is looking for that book again to be able to reverse the spell placed upon her.<br><br>
(Source: Anime News Network)

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Megumi Amatsuka, a rough and tumble nine-year-old boy, always dreamt of becoming the "manliest man on earth." Upon receiving a book of magic from a sorcerer whom he saved from a group of local thugs, Megumi summons a genie in order to make a wish. But due to a sick twist of fate, the genie turns out to be an evil one, and Megumi winds up being the "womanliest woman on earth"! Six years later... Megumi is the most desirable girl in school, but deep within her hot-mama facade is the same trash-talkin', punk-stompin' boy.
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(Source: Viz Media)