We’ve developed an app that sells digital content during online live entertainment shows. Fans purchasing the digital contents will be given opportunities to interact with the online live entertainment. The performers of the online live entertainment can broadcast the show simultaneously over multiple live streaming service and allow fans to interactively participate. Fans are able to send “hearts” and “requests”, and in return may randomly get digital contents (photos, signatures, songs, videos, etc) and special tickets that accompany it. All the digital contents will be registered on the blockchain and fans can trade or exchange their digital contents with other fans. This application aims to help fan to enjoy the online live entertainment at the same time provide performers a billing system that does not depend on the platform and contribute to improving the profitability of the entertainment industry.