Yeah, this game is not worth your time, at all. It's short, but brutally difficult. By "brutal" I mean, "You are not going to have a good time playing this." Every encounter is going to make you feel like you're a braindead idiot as the enemy gets to go three times every turn, has much more health than you, and can do much more damage than you. You only have 100 health, and the enemies, at minimum, have 200 or more.
The "tips" you get when you hover over the stages are pointless when the abilities you have to use to win cost too much sp to ever be used effectively to do anything. For example, one of the fights needs you to use armor penetration cards to pierce the enemy's defense, which is raised almost every turn. The problem is that the bastard has around 250 health, and the skills that you need to use cost 2 sp and do around 5 damage. It can remove one of the enemies actions, sure, but most of the time the enemy will be doing an attack when you get that card, and it most likely removes the top most action, which is almost never the damaging card, or the one that you need to remove. See the problem? I haven't gotten past that fight, but I honestly doubt it gets any better.
Most of the abilities are useless. Why does the defense up only give 7 defense points when most enemies do 10 damage anyways? Because they sometimes only do 5 damage, which the card nullifies, but that's so few and far between what does it matter? Why is almost every useful skill 2 sp or more, when you only get 2 sp a turn? WHY ARE THE ONLY HEALING CARDS, WHICH RESTORE 20 HP, A 1/5th OF YOUR TOTAL HP BY THE WAY, SINGLE USE FOR THE ENTIRE FIGHT, BUT THE ENEMY GETS TO USE HEALING EVERY TURN TO UNDO EVERYTHING YOU DO EVERY. FUCKING. TURN?! These questions and more are not answered, and the game instead opts to instead spit in your face for daring to question it, instead of, y'know, actually being fun.
The art is the only, and I mean only, good thing about this game. The scenes suck, the gameplay sucks, so the art is the only thing you'll be looking at. I'd say wait until there is a full save with all of the scenes or just look them up on a gallery site like ehentai or something, because otherwise, this game is not worth it in any capacity.