Feeling Blue The song, "Feeling Blue", is about dealing with personal issues and restricting yourself from proper and healthy relationships. It's a way of severing ties, so people won't get caught up with your problems, as well. Bio Updated Serro is an artist from manila who started as a producer in 2016. Now doing his own vocals and continuing his own production with the influences of Korean R&B and bedroom pop, his sound now consists of nostalgic, wavy, catchy melodies and hooks that complement a late night vibe.