Valkyrie Drive Mermaid episode 1
A mysterious illness is spreading among some girls.
Your mind can transform your body in any dangerous weapon.
While some are weapons, other girls have the ability to use them to form a duet (duet).
However, to prevent crime and to restrict criminal organizations, these girls are sent in one of 5 islands planned for it.
The story takes us into the lives of two girls and Mamori Tokonome Shikishima Mirei
