The duo Kiroro will be singing their first movie theme song for the animated feature "Keroro Gunso 4," which is scheduled for release in March. Their song, titled "Minna Anata wo Aishiteru," will be released in February, ahead of the film's opening.

The film's theme is "birth," which is appropriate for Kiroro as keyboardist Ayano Kinjo is currently pregnant with her second child. Kinjo also mentioned that her three-year-old daughter is a big fan of the "Keroro Gunso" anime series.