On June 14, Belift Lab announced that Enhypen would be releasing their third extended play, Manifesto: Day 1 on July 4, with a trailer titled "Walk the Line" released the same day.
With 1.24 million copies sold in the first week of release, Manifesto: Day 1 became Enhypen's second million-selling album and made them the fastest K-pop group to earn two albums in the million-seller category. In the United States, Manifesto: Day 1 reached number one on the BillboardTop Album Sales chart.