セカイ
A [[Vocaloid]] song by DECO*27 and kemu featuring [[Hatsune Miku]], one of the two commissioned theme songs for [[Project Sekai]], alongside [[Wah Wah World (vocaloid)|]].

"YouTube":https://www.youtube.com/watch?v=9vyIPWBeRes

h4. See also

* [[List of Vocaloid songs]]
* [[List of songs by DECO27]]
sekai (vocaloid)