PROBLEM TO BE SOLVED: To provide a system providing an incentive to buy a musical instrument to a customer renting the musical instrument.;SOLUTION: A game prompting the actual performance of melodies prepared by the side of a company providing a rental service of the musical instrument is provided to the customer for playing. In the game, the actual performance of test melodies is prompted, and conditional upon that the customer has been able to properly perform the test melodies, the retail price of the musical instrument is sequentially lowered. The customer devotes oneself to improve skill through the game, and proposes a purchase at a stage wherein the retail price has been lowered to a desired price.;COPYRIGHT: (C)2007,JPO&INPIT
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