To achieve a match-up game with higher amusement in a network game program.

A first consecutive action determination means 50 determines whether or not a pitcher character 70 consecutively or repeatedly performs a predetermined action at a predetermined frequency. A consecutive action execution flag-on means 51 sets a consecutive action execution flag indicating execution of consecutive actions into an on-state. A warning display means 53 displays a warning on a first display unit 3a on the side of a first game player responsible for a malicious play. Second predetermined action determination means 54 determines whether or not the pitcher character 70 performs a predetermined action in accordance with the operation of a first operation unit 5a after the warning display means 53 displays the warning. A first disciplinary action execution means 55 executes a first disciplinary action for the first game player when the pitcher character 70 performs the predetermined action in accordance with the operation of the first operation unit 5a after the warning display means 53 displays the warning.