The EP was a moderate success, entering at number 30 on the Gaon Album Chart.

Walkin' was released through several music portals, including Melon, and iTunes, for the global market.

[1][2] "Wine" was released as a single on April 27, 2017, previous to the EP conception.

[15] "1+1=0" was released as the title track in conjunction with the EP on June 2, 2017, and features singer Dean.

[24] The EP entered at number 74 on the chart for the month of June 2017 with 963 physical copies sold.