Bathed in the divine radiance of the holy sunlight, the inhabitants of Earth find themselves caught in a paradox. As the light grows stronger, so does the intensity of darkness. The shadows lengthen, enveloping the world. In this tale of two sorrowful sisters, one chosen by God and the other cursed as a demon, their fate is entwined with desire and depravity. Ricca, the younger sister, possesses the ability to transform into a holy knight. Driven by the quest to rescue her abducted sibling, she embarks on a perilous journey. Engage in epic battles against formidable monsters as you unleash an array of combat techniques in the pursuit of righteousness.