Game operating system, game operation method, and game operation program

A deposit management unit (22) receives a player-generated deposit instruction which is transmitted from a terminal device (12) and, in accordance with the received deposit instruction, deposits a virtual currency in an amount specified by the player. The deposit management unit (22) does not permit the player to use the virtual currency deposited by the player until a predetermined deposit period has elapsed. In comparison to the case where a player who deposits money does not make a deposit in the virtual currency, if the player who deposits money makes a deposit in the virtual currency, a reward granting unit (24) grants the player who deposits money a reward that is beneficial in a contest, until the deposit period has elapsed.