Ren returns to the town of his childhood, Kaminohara. 
Strangely, Ren is unable to recall any memories of the town. 
Meanwhile, his smartphone installs a mysterious game called Monster Strike — heralding the start of a desperate battle!
I've probably already met
some of you... before.
Einige von euch habe ich vielleicht
schon mal getroffen.
Algunos de ustedes ya me conocen.
Puede que ya os conozca
a alguno de vosotros.
J’ai peut-être déjà rencontré 
certains d’entre vous.
Eu posso já ter conhecido
alguns de vocês antes.