Arata is a quiet member of the high school photography club who has long been in love with his childhood friend, Shotaro Miyamoto, a popular athlete on the basketball team. While other girls frequently confess their feelings to Shotaro, Arata keeps his own emotions hidden, instead watching his friend from a distance through the lens of his camera. The photos he takes of Shotaro become highly sought after by their female classmates, yet Arata continues to conceal his true reasons for capturing those images. The fragile balance of their lifelong friendship is shattered when Shotaro reveals that he already has feelings for someone, leaving Arata to wonder if the person his best friend loves could possibly be him.

Set within the familiar social landscape of a Japanese high school, the story uses the contrast between light and shadow as a central motif. For Arata, photography is both a way to preserve moments of fleeting beauty and a means of expressing affection he cannot voice aloud. When Shotaro catches Arata eavesdropping on yet another rejection, he directly asks, Want to know who?. This question forces Arata to confront the possibility that his secret longing might be reciprocated, or that he could lose his friend entirely if the truth comes out. The narrative follows the emotional turbulence of their relationship as they navigate the shift from childhood friendship to a more intimate connection, capturing the awkwardness, misunderstandings, and quiet joys of first love.