A possibility of providing motives to continue a game is improved. A game system 100 stores a relation between user identification information corresponding to a user who plays a game and user identification information corresponding to another user who is a friend of the user, stores ranking determined based on the game history of plural users in association with the user identification information, when transiting to a rank screen 22 in which a predetermined number of sets of the user identification information of the users ranked at or above a predetermined rank is displayed, constructs and displays the rank screen 22 in which each set of user identification information is associated with each friend-request button 241b, and when a friend request is made by the friend-request button 241b, shifts to a state that allows these users to become friends.
Game system, non-transitory computer-readable medium, and game control method