"COOL 4 SKOOL" debut single of the hip hop idol "bulletproof boy band"! It boasts a running time of more than 27 minutes even though it is single. This is the result of the conviction and enthusiasm of the bulletproof boy band that the hip hop musician should talk on the record. The members showed their unusual skills by participating in the composition and composition of the whole song. "Hip-hop is a genuine piece of music that solves their own story." Like a bunch of boycotts, they wrote their experiences and feelings in rap. Thanks to this, there is no sense of difference between the sensibility of the bulletproof boys and the lyrics. It can be said that both quality and quantity are satisfactory.
