It is their first album under the Avex label, having previously been under Sony Music Entertainment Japan's sub-label onenation.

[1] Soulhead is the female duo's first original studio album since 2006's Naked and is their first album under the Avex label.

They were previously under Sony Music Entertainment Japan.

The album was only released in CD format with none of the songs containing music videos.

Oh her official blog, Yoshika apologized for the four-year wait and thanked those who worked hard to bring the album and the fans who were still there.