Meet Adam Shinjou, a very nice and insightful kid who just happens to attract supernatural occurrences. Wherever he goes something bad tends to happen to things around him- so much so that he's been forced to travel on his own. One day while seeking shelter from a storm in a supposedly abandoned mansion, he meets a little demon girl name Oska L Duke who has been stuck in the house for years. The two quickly becomes friends and, after an incident involving monster hunting nuns, decide that if the world won't accept them, they'll make a school for the supernatural kinds.

This however starts drawing the attention of other monster hunters as well which no doubt will bring Adam and Oska into conflict. Though with an ever increasing group of allies/staff, they may just pull off their dream yet.

Can be read [[http://www.mangareader.net/choujin-gakuen here]].

!!''Choujin Gakuen'' provides examples of the following tropes:

* AllGhoulsSchool
* AllLovingHero: Adam is this to a fault, since his love of everyone causes him to have difficulty thinking about himself and being able to use his darkness power at will.
* AllOfTheOtherReindeer: Many of the main cast.
* {{Artifact of Doom}}: The aptly named Living Artifact of Mass Destruction.
* BornLucky: Subverted with Adam. What's believed at first to be luck that lets him survive all the danger he attracts is instead the doing of the darkness that follows and protects him. Adam finding this out lets him use the darkness at will to power up.
* ChickMagnet: Adam is absolutely this, having already charmed several female characters almost immediately after meeting them.
** The Committee chairman, Eve, is this and a dude magnet due to her temptation ability.
* CrouchingMoronHiddenBadass: Adam, a bit of an airhead but very insightful and can defend himself. Just not as powerful as his comrades.
* CuteBruiser / PintsizedPowerhouse: Oska, Hachi
* CuteMonsterGirl: Oska
* DeathSeeker: This was Adam's motive at the start due to constantly being on the run from monster hunters and not wanting to put his new friend Oska in danger. She talks him out of it.
* FantasticRacism: Most of the humans seen, though a few do change their tune.
* AGlassOfChianti: When the committee chairman is revealed, even though the heroes don't meet her yet, Adam correctly guesses from her tone she's holding one.
* HeelFaceTurn: Yamada
* NeatFreak: Yamada
* ReallySevenHundredYearsOld: Oska who is at least 300 years old but doesn't look like she's more then 12.
* SpoiledBrat: The Chairman.
* StartMyOwn
* TalkingAnimal: Hachi, who is a talking dog.
** There end up being several more, due to Hachi being part of an experiment to create animal soldiers.
* VanHelsingHateCrime: It is said monsters hide in the shadows from humans who do this to keep them in check. This however extends to those that are friendly. So once word that someone was trying to make a school for the supernatural hit, the warning bells went up.
** Though later chapters imply that disaster should happen if monsters band together and that they are trying to prevent it. Still these hunters are portrayed as douches and seem to take pleasure in trying to kill them.