The Dreaming Boy Is a Realist follows high‑school student Wataru Sajō, who abruptly changes his behavior after realizing how persistent he has been toward his classmate Aika Natsukawa. His sudden shift creates an unexpected distance between them, drawing attention from their classmates and altering the daily rhythm of their school life. As both adjust to the new dynamic, their relationship begins to move in an unfamiliar direction shaped by Wataru's attempt to act more mature.