Squeenix's Twitter says it's for PC and something I couldn't read because it's Japanese:
https://twitter.com/...376828870897664
Or am I mistaken? I just saw people on another forum cheering about this (and freaking out too)
[ TIMELIMIT WITHIN 7DAYS ] PC&スマートフォン
=
[ TIMELIMIT WITHIN 7DAYS ] PC&SMARTPHONES
If it's for PC, at least it'll be on the bay soon after release.