The song was released on November 26, 2008, and is performed by Ships, consisting of Takuya Ide and Shikou Kanai as their characters, Hiroto Kazama and Seiji Hiwatari.
"Kimi ga Iru" is an insert song from Kirarin Revolution and is performed by Takuya Ide and Shikou Kanai, who voice Hiroto Kazama and Seiji Hiwatari, fictional characters from the show who are part of the in-universe group Ships.
"[1] To promote the song, Oha Suta aired live-action episodic segments titled "Kimi ga Iru" from November 25, 2008, to December 1, 2008.
[1] The episode is a fictional account behind how the music video for "Kimi ga Iru" was filmed, where Hiroto and Seiji befriend a snow fairy named Lareine.
[1] The music video was given a home release on the limited edition version of the CD album Kirarin Revolution Song Selection 5.