Generate a music composition prompt according to low valence and low arousal levels based on the given ABC musical notation: 

Compose a piece that conveys feelings of melancholy and restraint, evoking a sense of quiet contemplation and wistful longing. Craft a melody that gently unfolds, expressing a subtle sadness and introspection through its delicate and nuanced phrasing. Emphasize soft dynamics and use a restrained pace to create a tranquil and somber atmosphere throughout the composition.