The family heirloom passed down since the Edo period still holds its mysterious power. The girl chosen to inherit its strength, Seiko Mamiya, gains strange abilities after being struck by lightning. A team of male and female treasure hunters claiming to protect ancient relics appears to safeguard her. However, they approach with malicious intent and threaten Seiko. Her rescue comes from an unknown female student wearing the same uniform, possessing far superior powers. The battle between superhuman girls escalates into the greatest conflict in the universe, entwining senseless twists, humiliation, desire, and deep-seated grudges. Wave after wave of attacks leads to an unexpected conclusion—BAD END then HAPPY END.