The story is set in an alternate world, where the two great nations of Light and Darkness are faced for more than 20 years causing havoc in all cities, especially in a small town on the border of both nations.

In the game, you will take the place of Hachiro, a young soldier of the nation of light and servant of the king. He submitted on his own to an experiment that aimed to create war droids capable of using light as weapons and shields in battles. As expected, Hachiro hates all of the nation of darkness (for reasons that rebel in the game) but everything will change when the king ordered him to go to the border of the nations to speak with a blacksmith and leave an order of weapons. That's where the story gets a little complicated and it takes different courses according to the choice you choose.
[From Itch.io]