Dai Majuu Gekitou: Hagane no Oni  

Demon of Steel: Battle of the Great Demon Beasts, Les démons d`acier, Steel Devil, 大魔獣激闘 鋼の鬼, 大魔獣激闘　鋼の鬼

In 1999, un scientists discovered a new energy source on an isolated deserted island called sansara while trying to explore it. however, they unintentionally opened up a portal to another universe, releasing biomechanical entities that had been dormant. three years later, takuya goroza went back to the same island at the request of his college friend haruka alford. but, he soon realized that she was not who she seemed to be.