On a planet where science has advanced to great heights—Ondis—it is ruled by the cruel and tyrannical overlord “Dixon.” However, there are those who rise against him in secret—the resistance. Among them are a pair of kunoichi sisters: the older sister Haruka and the younger sister Fuyuka. They launch an offensive toward the planet’s core, the Cyber Tower, where Dixon is believed to reside. But Haruka, who infiltrates ahead of the others, goes missing—and when Fuyuka attempts to rescue her, she too falls into danger… “N-no… I can feel waves of pleasure welling up from deep inside my body…!” The Cyber Tower serves not only as the enemy’s stronghold, but also as a trap designed to subdue rebels!? Assaulted by obscene traps and torment, their minds grow numb as the climaxes refuse to stop—!!