It's national Square teasing day: Valkyrie Anatomia announced for iOS and Android
PG-18?

Square's not done teasing new games today though this one may never see the light outside of Japan.
Called Valkyrie Anatomia, it's a prequel of Valkyrie Profile. It will be produced by Yoshinori Yamagishi, with a soundtrack by Motoi Sakuraba and scenario by Bun-o Fujisawa.

No words yet on how it plays.
Japanese players can pre-register for the game here meaning that this should be a free to play title.
[Source]