I've started playing a Korean card battle called Dungeon & Girls.
It's a fanservicy dungeon crawler where you use a deck of cards to both advance and battle. You have both a standard deck, which is fixed based on what character type you're using, and several single-use cards that you can take before going into the dungeon (they disappear after you beat the boss, or get beaten by her).
Each card has a movement value outside of combat which you use to move forward towards the section's boss. In battle, the cards have several effects like attack, heal, power-up (enhances another card) and counter (counters an enemy's special strike, but not non-damage attacks).
The enemies are cute monster girls you can capture and use as your sidekicks. As far as I can tell, the idea is basically to fill out a sort of menagerie and give them gifts in order to make them like you more (thus increasing the power of both their regular attack and special abilities). Each monster girl has a particular gift she likes (zombie girl a syringe, doll girl a headband etc.).
I like the Bunny girl best thus far. Her Vorpal Claws ability has a 50% chance of firing off (as opposed to around 30% for the others) and does a good deal of damage. Though the ones with status effects might prove better later on.