EXO Kai presents a straight-line love song that falls in the more she listens to her new song 'Mmmh'.
The title song 'Mum' is an R&B pop song that combines simple yet addictive melodies on a minimalist track, and the lyrics have released a frank and confident tone of attraction to the first opponent. In addition, as Kai has proved the aspect of 'World Class Performer' by concentrating global fans' attention with powerful Performance and unique stage control through EXO activities, expectations are also being amplified for new stage and Performance to show with Solo song 'sound'.