"Miyabi (This Isn't Gonna Fit)" is a [genre-specific] track that features [notable elements of the song, e.g., catchy melody, emotive vocals, etc.]. The song's title suggests an interesting narrative, and listeners are encouraged to interpret the meaning behind the lyrics.
The phrase you're asking about appears to be a specific title or meme associated with Hoshimi Miyabi from the game Zenless Zone Zero --- Download -Aiden Het- Miyabi This Isn--39-t Gonna Fit
"Download -Aiden Het- Miyabi This Isn--39-t Gonna Fit" "Miyabi (This Isn't Gonna Fit)" is a [genre-specific]
The phrase works on three levels: