Fuyuko lives quietly, working as a freelance proofreader, her days largely free of contact with others except for occasional outings with an outgoing colleague. Accustomed to solitude, she moves through her days without expectation. Her only personal ritual is walking alone through the city at midnight on her birthday. A subtle shift begins when she meets Mitsutsuka, a reserved high school physics teacher, at a local culture center. Drawn to his gentle manner and his words—”Next time, let’s talk about light”— Fuyuko begins meeting him regularly at a café. As their encounters slowly accumulate, a fragile sense of connection takes shape. Yet both carry things they do not easily reveal.