If "Motchill" refers to a specific movie, series, or perhaps a music platform related to soundtracks, without more context, it's difficult to provide a detailed response. If Motchill is a service or platform:

As an opening soundtrack, "Soundtrack 1 Motchill" would probably adopt a flexible, cinematic structure rather than rigid pop-song forms. Typical sections might include:

Seon-woo stood frozen. He saw the realization in her eyes—the moment the background music finally became the melody. "Because I didn't want to lose the friend," he admitted, his voice barely a breath. "If I told you I loved you, and you didn't feel it... I wouldn't even have this."