Rapper San E shared the story behind VIXX Ravi's "Bomb".

On the February 1 airing of 'Kim Chang Yeol's Old School', San E explained how he got to feature in Ravi's first mini album. He said, "I've seen him at broadcast stations and only met him personally about twice. I knew he has a great passion for hip-hop." He continued, "Ravi asked me for featuring during the time I was struggling. I couldn't write even one line of lyrics so I apologized and rejected."

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However, San E explained that he changed his mind. He said, "After I've recovered a little, Ravi asked me again. Usually, when you get rejected once, it's hard to ask the second time but I was thankful that he asked again and thought highly of his passion. So I happily helped him out. We even filmed the MV together."