To oppose the tyranny of the Caligrest Empire, which destroyed the Orion Kingdom, the masked knight Rubynight joins the resistance. However, after being defeated in battle and threatened with the massacre of Orion's people, Rubynight sacrifices herself and is captured by Emperor Caligrest. Bound and stripped of freedom, her body succumbs to despair as her soft skin becomes a target of relentless assault. Her desperate resistance portrays the tragic transformation of a pure maiden's body, gradually corrupted by men's lewd desires. A painful and heartbreaking descent, culminating in her complete transformation into a helpless woman. [BAD END]