Bass and drums drop in. The melody opens up (remove the low-pass filter).

Remove the 808s and heavy kicks. Keep just the hi-hats and the guitar loop to leave room for "sad" vocals.

Hard-hitting and "punchy" to cut through the soft melody.

Fade out the drums first, then the melody, leaving only the rain.

Layer in "vinyl crackle" or "rain" sound effects to give it that vintage, lo-fi warmth.