Kazunari Ninomiya
"Beautiful World" includes five of the group's previously released singles: "To be free", "Love Rainbow", "Dear Snow", "Hatenai Sora" and "Lotus". "To be free" was used as the song for Mistuya Cider commercial with member Sho Sakurai as the endorser."Love Rainbow" was the theme song for the drama starring member Jun Matsumoto. "Dear Snow" and "Hatenai Sora" were used as theme songs for the movie "" and drama respectively, starring member Kazunari Ninomiya. "Lotus" was used as theme song for starring member Masaki Aiba.