Synopsis
In a reality where moving between closely related parallel worlds is a common occurrence, Koyomi Takasaki lives with his mother after his parents' separation and begins attending a nearby university preparatory school. Struggling with a highly competitive academic environment and his own social awkwardness, Koyomi finds it difficult to make friends. Unexpectedly, Kazune Takigawa, one of his classmates, approaches him and reveals that she comes from the 85th parallel world, where she and Koyomi are in a romantic relationship.
