Valis

Yuko Ahso is an ordinary Japanese teenager with an ordinary life - until one day she is attacked by a monster on the street. Out of nowhere, a sword appears in her hands. She fights the monsters who have suddenly invaded the city, and is summoned to the parallel world known as Vecanti, which is ruled by a cruel tyrant named Rogles, whose actions disrupt the balance of the the worlds. Wielding the legendary Valis sword, Yuko must defeat Rogles and restore the balance.