(English translated version for non-Vietnamese. For original version, check "Bầu Trời Hai Mặt" on Ranoku.)
In the 23rd century, the world is no longer divided into separate nations. For the sake of shared prosperity, humanity has united, yet never truly become one. Despite the peak of both atomic nucleus and magic (Thema particles) technology, warfare has never ceased.
On the relentless front lines, warriors clash day by night. Commander Stratos of Section W, representing the Neos Alliance of Thema Innovation for Operational Nations (N.A.T.I.O.N), and Lunamaria Whieblod, Commander of the 4th Legion under the Optimized Republic of Governments for Atomic Nuclear Innovation Zones And Territorial Integrated Operational Nexus (O.R.G.A.N.I.Z.A.T.I.O.N), have become the twin emblems of an endless war. Wounds on their arms, swords drawn, bullets chambered, every battle is fought not only for duty or conviction but also for the dreams buried deep within their souls.
Showdown, Betrayal, Formation, Collapse, which one is the right path? Everyone understands the tides of era, yet none can foresee the future.