The two release marks the signing of band with the Giza Studio record label.

The other single that was a part of this release was "Kimi no uchi ni tsuku made zutto hashitte yuku".

"Mysterious Eyes" was used as the seventh opening theme for Case Closed in Japan and had a direct impact on helping it score in the 20th position on the Oricon chart.

The song has some alternate versions too, those being "Mysterious Eyes ~dry flavor of G mix~" from the album "SPARKLE ~Sujigakidoori no Skyblue~", and, more recently, guitarist Okamoto Hitoshi created a version called "Mysterious Eyes ~Reason P.~", available for download using a QR code card included in his album "Now Printing...".

[1] All tracks are composed by Yuri Nakamura, written by Nana Azuki and arranged by Hirohito Furui.