I just googled who made this and I found that it was made by the same dev as Arc Rise Fantasia (Imageepoch) and that it has closed recently.
Both games seem to be challenging, and the Exp system is similar in both games too (I don't know if in Arc Rise Fantasia it's as ruthless as here). The first game I played with a system like this was Suikoden.
I have Stella Deus around, I dunno if it has any relation with this game (both published by Atlus) and if it's worth playing.







