Majin Bone

In modern-day Japan, a phenomenon is occurring, dismissed as irregular land subsidence and unusual weather patterns. Ryuujin Shougo is your average high school student, heading to school as always with his childhood friend Saho. Three young men are tailing him -- "Is he really Dragon Bone? Humanity's last hope?"

Having transformed into Dragon Bone, Ryuujin Shougo is warped into a strange alternate dimension, where he fights the mysterious enemy Dark Bone. Dark Bone gives Dragon a hard fight, and drives him to the brink of destruction. Just then, three mysterious silhouettes appear behind Dragon.

Shougo equips his Bone with the three young men Antonio, Luke, and Tyrone. By demonstrating that he can equip Dragon Bone with his own will, Shougo has proven himself a chosen warrior. Shougo doesn't understand what's going on, but Luke explains to him that Dark Bone is trying to steal the Bones of Earth, and if all the Bones are stolen, there is a chance that the Earth could be destroyed.

Dark Bone has appeared, but Shougo can't transform into Dragon. The Bone has the will to fight, but Shougo is unconsciously rejecting the fight. Therefore, he can't equip his Bone. Shougo stews over the questions of why he must fight, and why he was chosen for his Bone.

The fourth Bone adept, Gilbert, arrives at an airport in Japan. Shougo and the others go to meet him, and learn that he is a thirteen year old boy. But he is also the most severe out of all of them. He's looked through Shougo's file and immediately declares that he took too long to adapt to his Bone.

Gilbert equips Leo Bone and fights Dark Bone for the first time, but Dark Bone forms a line and summons a Majin. Their leader, Dark Horse, has such powerful kicks that Leo can't hope to match him. Shougo, shaken by his first sight of a Majin, begins to feel anxious over whether they could ever hope to beat them.