I was considering two songs when answering this question, it was between Cavetown's Big Bowl in the Sky and Michael Jackson's Man in the Mirror. Ultimately, I chose Man in the Mirror. This is because throughout everything Koipaw has already experienced at a young age (the death of some of his friends and sibling, as well as growing up without a prominent parental figure), he wants to make a change within the clan. He wants to improve himself so what happened to majority of the kits in Leafbare doesn't happen again, he wants to learn how to be a strong hunter and an active father in his possible future kit's lives. He wants grow to become a strong, capable warrior that can make Starclan proud.
Disclaimer: Koi does not own wired earbuds, although if he did, I think he would be into metal. Unfortunately that was not the question I had to answer lol. FANGNULL on Toyhouse Song: Michael Jackson - Man in the Mirror