When an action content command and an action target character is received, a control section and a graphics processor identify action executing standby time in accordance with a predetermined time identifying rule. The control section and the graphics processor then identify an action executable range in which a player character can execute the received action content in accordance with a predetermined range identifying rule, and determines whether or not an action target character that is a target of the received action content exists within the identified action executable range. The control section and the graphic processor execute the received action content against the action target character in the case where it is determined that the action target character exists within the action executable range when action executing standby time is clocked.