It features six tracks, including the lead single, "Like Ooh-Ahh", which was composed by Black Eyed Pilseung and is a blend of several different genres.

On February 11, 2015, JYP Entertainment founder Park Jin-young announced the company's collaboration with Mnet to air Sixteen, a competition survival show that would decide the lineup of an upcoming girl group, the first under JYPE in five years, following the debut of Miss A in 2010.

[1][2][3] The show concluded on July 7, with Nayeon, Jeongyeon, Sana, Jihyo, Mina, Dahyun, and Chaeyoung being selected as the seven Twice members.

[7] On October 9, Twice released a group teaser image and confirmed that the lead single for their upcoming album is titled "Like Ooh-Ahh".

[9] On October 12, the group released individual teaser videos featuring Nayeon, Momo, and Mina, which depicted certain notable characteristics or personalities of each member.

"Like Ooh-Ahh" is produced by Black Eyed Pilseung, who had previously worked with other artists under JYP Entertainment including Miss A and Got7.

The second track "Do It Again" was written by Park Jin-young, lyrically describing the excitement one feels after receiving a confession of love from another person, and was previously performed by Twice in Sixteen.

"Going Crazy" is another song that was first performed by the group during Sixteen, and lyrically talks about uncontrollable feelings due to infatuation.

The album's closing track "Like a Fool" is an acoustic song that tells about a girl's heartache after being unable to confess to their romantic interest.