One of the challenges for companies when developing concepts for new products, services or applications is whether or not the concepts will make sense to the user. And evidence that a concept will be valuable should preferably become available early in the design process. Involving users in the process of reflecting on new concepts makes sense because they are domain experts. However, in order to judge whether a concept will bring added value, users need to envision future contexts of use. We present the Co-Constructing Stories method, which aims to facilitate this envisioning process for users. In one-to-one sessions of less than an hour, first users are prompted by stories about the current context, helping them recollect relevant real li...