On streaming aggregators popular in Vietnam, such as , Soundtrack #1 generated specific buzz for the following reasons:

Soundtracks can become deeply ingrained in the memory of audiences, serving as a nostalgic reminder of the movie or series they enjoyed.

The narrative follows Han Seon-woo and Lee Eun-soo, best friends who have been inseparable for nearly two decades. When Eun-soo is tasked with writing lyrics for a song about unrequited love, she finds herself struggling to capture the authentic emotion of heartbreak. A Beginner's Guide to Using Motchill for Online Streaming

She stood up, walked across the small gap between them, and took his hand. "The song is finished, Seon-woo," she said, her voice steady. "But I don't want to just write it anymore. I want to hear it. Every day." Key Elements of Soundtrack #1