AOA brings the fourth single. The title song features Takanori Nishikawa (T.M.Revolution) and is the first work made in collaboration with Japanese male artist. Contains three new songs and their karaoke versions in total (subject to change). Comes with a bonus DVD with music video(s) of new song(s), excerpts (1) from "ANGELS WORLD 2015 - Oh BOY ACADEMY -" concert in Japan (three tracks), and more (subject to change). Comes with a randomly selected photo card.