What makes First Sensibility by B.A.P notable?

'First Sensibility' debuted at number one on the Gaon Album Chart and significantly contributed to B.A.P's rise in popularity within the K-pop industry. The album is noted for its fusion of various genres and has influenced subsequent K-pop acts by setting a high standard for cohesive and concept-driven releases. Released on February 3, 2014, 'First Sensibility' is B.A.P's first full-length studio album following their successful debut EP 'Crash' in 2013. At this point, they were establishing themselves as a prominent force in the K-pop scene, building on their earlier hits while showcasing a more mature sound and diverse musical styles.