"Hello World" is Hikutsu-P's first original work using Megurine Luka. The song is about Luka introducing herself to the world. This song is one of Luka's earliest and has entered the Hall of Fame. It is featured in the albums EX:P2 ～Ex:Producers2～, Click Suru to Kakudai (クリックすると拡大), and Jiko Best (事故ベスト).