Program, and mobile communication terminal

A branching tree program replays audio data, and thereafter, when the user performs a selection of alternatives, the branching tree program replays audio data in the branching tree which is the target of selection. The branching tree program progresses a game by repeating this type of selection and replaying. If the end of the branching tree is reached, or if the next item of audio data is not stored upon the portable telephone, then the required data or program is downloaded from a server device 50 , and the game is continued. Accordingly, along with it being possible to progress the story of the game by simple actuation, also it is possible to economize upon the storage space, and moreover it is possible to utilize story data without changing the program. As a result, along with it being possible to progress the story of the game by simple actuation, also it is possible to economize upon the storage space, and moreover it is possible to utilize story data without changing the program.