SEKAI NO OWARI releases the physical edition of the first single commemorating their 15th anniversary. This deluxe double A-side single features "Kohaku" and "Zukan". The DVD included in Limited edition B features the music video for "Zukan," along with making-of footage, interviews, and other content related to the song. It also includes a special feature titled "SEKAI NO OWARI Shokugyo Zukan" [ Nakajin Version, Saori Version]. Additionally, it comes with the "SEKAI NO OWARI Member Zukan" (Nakajin Version, Saori Version), which introduces the characteristics of each member with newly drawn illustrations. Packaged in a digipak.