EXO Kai's solo debut album, Kai - The 1st Mini Album, reached #1 in 60 countries on the iTunes Album Chart. The title track Mmmh also reached #1 in 36 countries on the iTunes Song Chart.

Out of all SM artists, Kai's solo mini-album is ranked 5th for the most number 1's on the iTunes Album Chart. Number 1 is Baekhyun's Delight which topped the iTunes Album Chart in 69 countries.

Additionally, after debuting and staying at the top of the Worldwide iTunes Album Chart, Kai (开) has remained on the chart for 14 straight days.

On December 10th, Gaon Music Chart updated its weekly charts in which Kai's solo Mini Album title track 'Mmmh' debuted Number 1 in Gaon Download Chart. Not only the title track but also the album, 'KAI'(开), debuted at 3rd place in the Retail Album Chart and 4th place in the Gaon Album Chart.

Kai has released his solo mini-album on November 30th.