Tokyo Valkyries

Grand Earth, a world of swords and magic, was trampled at the hands of Belzebia, a dark spirit wielding unfathomable power.
In time, the shadow of her conquest began to creep towards even our reality, where magic does not exist...
Unaware of such a threat, Haruka Fuchi, a university student in Tokyo, is led by a voice crying for help and steps into a strange space.
Where she ended up was an Underworld, a space in between Grand Earth and our world, created by Belzebia.
In this Underworld, replete with the presence of darkness, Haruka meets a girl who introduces herself as Artesia.
If the Underworld is not sealed and Belzebia stopped, the world will be led into annihilation...
Now aware of the threat facing her world, Haruka would venture into the abyss of darkness with her allies.