When Akihiko Bushida's childhood friend, Ryu Kazama, goes missing, he sets out to find him. However, his search ends up leading to his own death and he wakes up in the world of Seldain as a Hero with magical abilities. Now Akihiko must team up with new and old friends to help take down The Demon King so he can get back home.
As in the story of Adam and Eve, this world is full of "fruits" of godly knowledge. They allow people to do things that are beyond normal human knowledge, so they are referred to as "Unknown." To use them, one needs to be in a pair, an "Eve" who knows the fruit and can dispense its knowledge, and an "Adam" who can use its power. Ox and Iwan are one such pair, and they're tracking down and gathering all of the other "Unknown," but what is their final goal? (Source: MangaHelpers)
The White Jewel Pin, a precious treasure, is only worth something when both halves are present. When the White Jewel Pin breaks in half, two men from different organizations become the carriers of each half. And both are determined to get the other piece. One for freedom, and one for the master who saved him. (Source: MU)
Unknown no Madousho
Unfortunate accidents and strange occurrences are mostly devil's work. People might not realize this, but the world is full of devils. Professor Sakakibara and the devil Unknown solve cases between human and devil using the Book of Sorcery. Included one-shots: Furou Kyoudai Tokubetsu-hen; Kaizoku-hime