What makes Guilty Love by 2PM notable?

'Guilty Love' is notable for its commercial success, peaking at number five on the Gaon Album Chart and receiving positive reviews for its catchy hooks and production quality. This album also reflected the evolving trends in K-pop, showcasing the genre's shift towards more mature themes. Released on January 1, 2015, 'Guilty Love' marked a significant moment for 2PM as it was their first release after a two-year hiatus. The album came during a transitional phase for the group, aiming to reestablish their presence in the K-pop scene with fresh sounds and themes.