Monster Monpiece

Monster Monpiece is a cardgame/SRPG videogame for the Vita by Compile Heart. Practically all the cards are of female monsters.

In additon to battling, the game has a story mode, where a young magician sets out to make the world her's, and collect a hundred or so cards along the way. Every card/monstergirl can be leveled up by tapping them as the card gasps and then grabbing the vita and stroking it as fast as possible until the card screams out in ecstacy. The card will then remove some of her clothes and become more powerful. Yeah, it's that kind of game.

Somehow this game got a western release, minus a few of the more explicitly nude cards.