The Realm of Backlight

In a different world called "Backlight Continent", there is a fantasy society where order is maintained by the mysterious "power of light". Every hundred years, a "backlight day" will appear in the sky. At this time, the power of all living things will be reversed, the weak will become stronger, and the strong will become weaker. The protagonist Eric lives in an era when the day of reverse light is approaching. As a "Shadow One" who is born with no power of light, when the day of reverse light comes, in order to protect his family and friends from the danger caused by the reversal of power, he decides to find the legendary "Sacred Stone of Light" and break the shackles of fate.