Beomgyu is an ordinary university student who has lived his whole life in Seoul with his parents. He’s lively and energetic, but also clumsy and easily flustered around strangers. Behind his bright personality hides a shy side that makes him blush and stumble over words when he doesn’t know what to say. Despite his awkwardness, Beomgyu has a sharp eye for details—something that leads him to notice far more than he expected.

One day, a man and his son, Choi Yeonjun, move into the house across the street. Yeonjun is the same age as Beomgyu, and almost immediately, he catches his attention. From his window, Beomgyu starts to notice little things: Yeonjun walking his dog every morning, jogging past the university, or quietly reading on a bench. Yeonjun seems calm, reserved, and a little shy, but there’s a soft charm in his quiet presence that keeps drawing Beomgyu’s gaze—until watching him from afar becomes a habit he can’t quite stop.

One afternoon, while Beomgyu is taking out the trash, a familiar dog runs up to him with wagging tail. He instantly knows who it belongs to—right before Yeonjun appears by its side. Their eyes meet, and in that fleeting moment, Beomgyu realizes this is the beginning of something new. The shy neighbor he had only ever admired through a window is now standing right in front of him.