 Hamasaki further promoted the album with several business and endorsement endeavours, including theme songs that were adapted from the album and other musical releases.In October 2013, Hamasaki announced she had worked on new music when she revealed the release details of her single "Feel the Love"/"Merry-Go-Round", which was her first physical release in three years.Then in May 2014, Japanese music publication Jame World confirmed the involvement of Western musicians and producers RedOne, Rodney Jenkins, who uses the alias Darkchild, and Fedde Le Grand, among others that were unannounced at the time.