<p>In this research, we propose a communication support system that provides moderate relationship among third persons without a sense of duty of reply. Users communicate anonymously through a photograph. A user uploads a photograph with a short text. The photograph is sent to more than one user chosen at random. Reply of comments is optional so a receiver of a photograph can let it slide. In reply, users can use not only short text also reaction button such as 'cute!' or 'don't mind!' to reduce the effort of reply. From the result of an experiment, we cleared that the proposed system support the communication while encouraging a reply to not feel a sense of duty. </p>