In this research, we propose an online service which utilizes social networking service (SNS) as the medium and japanese cartoon (manga) as the communication method. The growth of SNS has created a new potential in marketinng. While users communicate and interact viia SNS, the list of their conversation which is called casual data can be used to determine their needs or aspirations. SNS can be very useful for product/services. Furthermore, SNS provide a unique system that enables expressive and two-way communication between its users. SNS is known for its effectiveness in delivering fresh news and information, therefore it can be used as promotional media. Although several online services that utilize SNS and casual data have been provided, the purpose of those services is still unclear and ineffectie. In those services, users were only asked for their opinions without receiving sufficient feedbacks. To solve those problems we propose an innovative way of utilizing SNS and casual data in designing user generated design. In our proposed system, users can directly contribute to the product/ service development process in an interesting way. We designed an online service which allows users to posts manga that describes their original idea. While contributing to the product/service development, they can also benefit from expressing their hobbies and receiving feedbacks from other users. Keywords: user generated design, social media, casual data, sytax analysis, japanes cartoon/manga