Titled "You Are My Baby", the members commented, "We are happy to announce that we will be participating in the 1st round of JTBC's 'The Package' OST."

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Onto their track, B1A4 described it as, "a fun song allowing listeners to look back on the anxious moments in starting a new relationship."

Meanwhile, 'The Package' stars actress Lee Yeon Hee and CNBLUE's Yonghwa.