A technique for allowing a virtual experience of more realistic live performance. A main apparatus reproduces music data and audience video data recording a video image of audience. A user holds a microphone and makes a live performance for the audience displayed on a monitor. The microphone sends voice data and motion information of the microphone to the main apparatus. The main apparatus determines that the user makes a live performance when the user calls on the audience with a specific phrase and performs an action corresponding to the specific phrase. The main apparatus reproduces reaction data recording a video image and sound indicating a reaction of the audience to the live performance.