Still can't understand what to do in card mini-game.
I'll try making it as simple as possible.
On top of the screen you have 7 tiles. 2 outer red and one middle green. your opponent stands on the green at the start and your goal is to either push him to his red or for you to stand on the green one when the fight's over.
To do that you have 3 bars on the left side (for simplicity sake I will use colors) red blue green left value is your and right value is opponents. when you play cards those values will rise/drop based on the card and when you end turn those values will decrese and the person with higher value wins THAT VALUE CHECK and pushes the opponent by that many tiles. Now if you win 1 value and lose 2 your opponent will push you back by one tile and vice versa. If you win all 3 values you will push your opponent 3 tiles and vice versa. I'm not use how draws work but I think draws are ignored and other values are checked, based on how much draws there are.
Tip: you can always see how much will your opponents values rise at the start of each round. On top of the screen there are 5 different value sets. they are chosen randomly for your enemy at the start of each round and only once during the fight.
Cards have many effects that even I don't know, however you have mini guide at the bottom left corner I think. From simple additions to the values, cards can also draw cards, shuffle decks... all with different symbols. theese symbols are important since all enemies a lewd event if you get or use the symbols too many times during the fight.
Now, cards have cost. on top of the card. the cost varies from mood, lock, medal, gold... AND HEART (very important) if you dont have enough of certain resources you cannot play the card.
Cards have character picture on whom the card is based on. They will take THAT CHARACTER'S stats into account if they give % values when played.
All cards have discard effects. (when discarded cards either give you mood, lock, draw a card...)
You get 5 cards and the begining of the fight and you draw 1 or 2 each round I'm not sure.
Lewd events in fight trigger after you gain too much of one value during the fight, draw number of cards during one round, recieve a number of a certain resource during one fight... OR after you play a card that has a HEART in it's cost. Every enemy has a special trigger stat so far and every enemy has a different caracter whom they have a lewd event with and it's always the same character.
If the lewd event triggers, your character that is in the event gets bonus to lewd stat and you or your enemy (not sure) generate a bonus of one value each round. For the duration of the fight you can no longer use cards that have HEART as a cost and you cannot use the cards that associate with the character that is in the event.
That should be all. I hope you understood me and will have it much easier playing. Keep in mind this is the current version of the game, and there may be more changes in the future updates.