Tempo around 107 BPM, 4/4 time, key in Eb major. Emotional and nostalgic pop ballad with a warm but bittersweet atmosphere. Piano is the main instrument and leads the entire song. Structure: Intro (8 bars) → Verse (16 bars) piano solo only, gentle touch, wide dynamics, expressive voicing. From the Chorus, add drums, bass, and soft analog synths to lift the emotion and create a sense of longing and emotional swell. Use smooth extended harmonies such as Ebmaj7, Fm7, Bb7, Ab, Db9, and colorful passing chords. Melody should be lyrical and flowing, with tender phrasing and clear emotional contour. Bass moves melodically, drums stay tasteful and restrained, synth pads remain warm and airy. After the final Chorus, drop drums, bass, and synths. Keep only piano, expressive tenor sax melodic lines, and soft vocal scat phrases, slowly fading out with an intimate, reflective mood. 落ち着き, 郷愁, 感情的な, メロディック