Synopsis
The realm of Lingalind is encircled by a mystical barrier that appears to enclose the entire world. Revered as the source of the land, this wall periodically descends celestial gift capsules known as Rakuho to various sites across the continent. These monthly arrivals contain metallic armbands capable of transforming their users into mechanical warriors called Briheights. This power has ignited continuous conflict among the nation's warring factions, each striving to secure these offerings to bolster their military strength. The status quo is disrupted when a Rakuho capsule crashes in a rural area, revealing an unexpected occupant: a mysterious man with black hair. All attention turns to this enigmatic stranger, who introduces himself as Back Arrow, after he asserts that he originates from beyond the wall. His claim threatens to dismantle the foundational beliefs upon which Lingalind's society is built.