SAKAMAKI Tougo, known in less human circles as Karlheinz, is a terrifying, Godlike creature of magical power and knowledge ever in pursuit of more. Intelligent and manipulative, he rarely takes action on his own these days and pulls the strings of events as he wishes them from a distance. Incapable of "normal" emotions even as they exist within his demonic sub-species, he admires and glorifies human emotions due to their alien nature.

Karlheinz manipulates everything to his advantage, using all resources at his disposal to replace the current demons with a "new race" and "save" the Demon World. There are seemingly no end to the number of experiments run to accomplish this task, including his wives and sons as resources in them without a second thought.

The demon "god" of the bat clan (vampires) has numerous experiments both within and without his family. After all, there are so many resources to test, so many possibilities for creating the perfect demon race.

You may not even know your potential as an Adam or an Eve, but the string is tightening. Demon sub-species (vampire, etc.), human, student, teacher, janitor - whatever you are or believe yourself to be, circumstances have drawn you to be involved in Ryoutei Academy, a very well established night school for high school and college students.