ZERO!!

"ZERO!!" is performed by Minami Kuribayashi and serves as the opening theme for the 2013 television anime Hataraku Maou-sama! (The Devil Is a Part-Timer!; はたらく魔王さま!), which was animated by White Fox. The song was released by Lantis on April 24, 2013 as Kuribayashi's 28th single.

Minami Kuribayashi wrote the lyrics, while Tetsuya Kuroda composed and arranged the title track. The single also includes the B-side "TIGHT KNOT" and instrumental versions of both songs, and "ZERO!!" later appeared on Kuribayashi's 2013 studio album one drop. On July 20, 2022, the song was also issued on the digital release WITH - EP.