Ayakashi: Romance Reborn - Sup

I am really love this game. Character design and the story is to good. I can't help myself to play this everytime. I'm really enjoy playing this game.

Game itself is a delight, but I have to take a star off for two things: 1.) How difficult it's become to get story keys. I'm at rank 70 and it now takes days of patrol grinding to get a single one, barely halfway through my second route of the five available. I'm amazed there's no simple diamond-to-key exchange, let alone any "buy keys outright" option. 2.) The fact that the low-level holy water -- necessary in great quantity for unlocking Skills on the Spirit Board -- is only available a couple at a time from the Milk Hall, and even then only with the lowest-level party you can send. There's no "optimize for F-rank" option; hitting Optimize slots in the highest level cards you have, which generally means you skip right over the ranks where bronze holy water is possible as a reward. I don't want to drop the game, but I've hit a bit of an advancement ceiling here where it takes me aaages to get even a little farther forward. Please consider tweaking the balance of some of these mechanics to make full exploration of this lovely game possible.