Pia Carrot e Youkoso!! G.O. - Grand Open Gogouten

Was inspired by a Japanese dating sim series by Cocktail Soft (a part of F&C, later F&C FC02). The games are all set around restaurants in the fictional "Pia Carrot" chain, and most of the female characters are waitresses at these restaurants. The individual restaurants in the chain are called "1st", "2nd", etc.