Mahou as in magic and Hentai as in Abnormal though that doesn't mean there will be no sex.
A young (or men) man from the mortal realm (Alex. My main)) comes across a strange book. It glows eerily, his* instincts tell him to leave it be but does he? Hell no! He rips open the book and from its pages a thousand hands grab him and yank him inside the book. He arrives on the other side in a world of magic, familiars, fae, monsters and worst of all demons. He’s just arrived in a school (or village) for/of witches! He** find that as if too really mess him up he’s become a woman. To get back home he must be recognised as a fully fledged witch.
The only way to do that is to master the powers of witch craft and be recognised by at least five of the council elders in the distance capital city of Laputa.***
(*If it’s more then one guy then the book copies itself.
** Or they.
In this world there area number of rules I that need to be devised. Magic takes several forms and not all characters are capable of it.
Human men cannot perform magic however they are able to draw on there spiritual energy and use it to unleash magic like attacks.
Not every girl in the witch villages become witches in fact witches are generally the minority in these villiages.
Men and women who don't fight are in charge of other essentials such as food gathering, making clothes, tools that sort of thing.
The fae are all able to use magic but they are not all uber powerful. Demons are the same as the fae folk.
These are the mystical styles that are available. (An apprentice has to master them all to at least a moderate level before they are recognised as Witches. On that same note all Council witches are skilled in all styles but may be even more powerful within a very specific category. Each of these categories allow for many things for example elemental control is whats need to fly a broom stick. (Witches only of course)
Elemental (This is the idea of drawing, creating and controlling the natural energies these are Level 1 Fire, Water, Wind, Earth, Level 2 (you need two of a previous form to create these) Ice, Lightning, light, Darkness, wood etc Level 3 (the absolute ultimate level) Spirit*, Dimension, Time etc)
Apothecary (The art of potion making.)
Transformation (More details later)
Familiar (This involves creating or enchanting an animal or creature at the basic level this would involve getting close to the animal making it possible for it to communicate (mentally or vocally) at the higher levels this would involve transforming it to fit your needs.
(More to come)
(* Spirit is what non magical fighters learn to obtain. Through there method they can skip the other elements and create spiritual energy there control is less fine tuned and it takes them longer to create a stronger power. Because of there method they are unable to use the other elements without a magic user. )