HuniePop
https://www.youtube.com/watch?v=NcGPYxpPt6Q
It's a hentai dating sim/match three block puzzle game.
The Humble Store is currently having an end-of-summer sale, and HuniePop has shown up in there once or twice for about five bucks, and probably will again before the sale ends. It's censored on Steam, but the developers offer an uncensor patch, hosted offsite.
I can vouch this is a pretty good game, especially if you pick it up on sale.
I wrote a review here on Hunie Pop on my blog https://boingbb.wordpress.com/2015/07/20/hunie-pop-pc-review/
There's basically two elements, one take a girl on a date and play a match 3 game and get the required number of points with a limited amount of moves. The matches you make gives you points that you can go and buy gifts for the girl or level yourself up.
The other aspect is getting all the collectables in the game. I found the dialogue to be pretty hilarious as well. Its a pretty good game for a few hours until the novelty wears off so don't expect too much.