Shintaro Kuze, an up-and-coming writer, ends up boarding at his mentor's house. There, he shares the space with a live-in student named Shogo Katsuragi, making things a bit awkward for the introverted Kuze.

One day, Kuze is asked to mentor Katsuragi, who has brought along a piece of writing practice.
Though he agrees only reluctantly at first, he soon finds himself utterly captivated by the work before him—its depth and brilliance unlike anything he would have expected from Katsuragi's cheerful, easygoing demeanor...