Beelzebub

Kuzumi Hiroshi moves with his crippled sister and his father to the remote city of Jouga, which is famous for its hassaku citrus and the rumors that a species of enormous wolves once lived in the area. While some of the residents are more than friendly, when people begin to vanish suddenly, it becomes apparent that something sinister is afoot...

Five years after the death of the Emperor of Marmo in the War of Heroes, Parn is now the Free Knight of Lodoss, he and his old allies now famous through the land. However, the Emperor's right-hand-man, Ashram, seeks the Scepter of Domination to re-unify Lodoss under his former leader's banner. Meanwhile, beyond his attempts at conquest lies a more sinister force beginning to set the stage for the resurrection of the goddess of death and destruction...

Gaimetal, a metallic mineral with high amounts of pure energy, was discovered 50,000 meters underground in 2047, and began mining worldwide. However, Gaist, which are metallic life forms whose bodies are fully embedded with Gaimetal emerged in 2055 and started to attack people. In 2064, Rekka, Hayato, Kurama, and Siren are among those known as Gear Gaist and they faced the battle with more than 100 varieties of creatures Gaist.