Reading comprehension can be defined as the process of reconstructing a story from reading material. With this definition in mind, we conducted post-reading retelling activity in pairs in one Japanese reading class, in which each pair of learners retold the story to each other. As a result of analyzing their dialogic interactions, we observed some patterns in learners' reconstruction. Their interactions are considered to be influenced by various kinds of factors, such as learners' Japanese proficiency level, their beliefs about reading comprehension, and the level, structure and content of reading material.