The EP was released on March 27, 2017, at noon KST through several South Korean music portals, including Melon, and iTunes for the global market.

[1][2] Girl's Day held their first comeback stage on SBS MTV's The Show on March 28, 2017, performing "Love Again" and title track "I'll Be Yours".

[8] The title track entered at number 76 on the Gaon Digital Chart for the month of March 2017, with 109,375 downloads sold.

[12][13] The EP also entered and peaked at number 7 on Billboard's World Albums for the week ending April 15, 2017.

[14] The EP entered at number 15 on the Gaon Album Chart for the month of March 2017, with 8,104 physical copies sold in five days.