Lisa, a demon-hunting girl, follows her destiny and steps into the realm ruled by the Circular Demon.

It is a place known as the Shifting Prison of Lust, from which no one who is imprisoned can ever escape. Lisa begins her battle there alone, determined to defeat the demon…

An encounter with the enigmatic elf merchant, Silly, will eventually give Lisa an opportunity to confront herself and her own desires…

Will Lisa be able to defeat the demon and escape?