Recettear: An Item Shop's Tale is a Japanese indie (doujin) game developed by EasyGameStation that combines RPG-style shopkeeping with dungeon-crawling. The game was first released and distributed at Comiket 73 in December 2007, then later translated into English by Carpe Fulgur and made available on the digital distribution services Steam, Impulse, and GamersGate in September 2010, where it has since gained popularity.
In Recettear, you play as a young girl named Recette Lemongrass whose father has vanished and left her with a substantial debt. Luckily, Tear, the fairy representative of the Terme Finance Company who comes to collect her debt, is somewhat lenient -- and, with her help, Recette opens an item shop named Recettear to begin the difficult task of earning enough money to chip away at her debt.
You can gain your worth by buying low and selling high in the shops, or by exploring dungeons in an attempt to acquire expensive items from monsters and treasure chests.