Please help me understand a grammar from this song. On the 31st second of this song, the lyrics has the sentence 「君のいない世界。。。」. I can understand very clearly that this means "~a world without you~". However, I want to understand the use of 「の」-grammar in this sentence, because, if I were to translate "~a world without you" from English to Japanese, I would've used the 「が」-particle. 「～君がいない世界。。。」. What is the difference between using 「の」and「が」in this same sentence? Here is the link: https://youtu.be/vRAj_jkn7Qc?t=31s Thank you very much in advance.