Love Song is an album containing songs sung by Riya from Eufonius first released on August 31, 2005, in Japan by Key Sounds Label bearing the catalog number KSLA-0019. The album contains one disc with thirteen tracks composed and produced by Jun Maeda of Key. Additional participating musicians include Kendi Sato on electric guitar for tracks two and twelve, AchillesKEN on percussion for track seven, and Weisswurst on violin for tracks seven and thirteen. Cover art for the album was provided by Yoshitoshi Abe who also provided illustrations inside the album's booklet. Love Song is a concept album which tells the narrative of love as it heads toward ruin.

Key Sounds Label is a Japanese independent record label formed in 2001 as a brand of the publishing company Visual Arts. Key Sounds Label was formed to catalog and release music related to visual novels produced by the brand Key, also under Visual Arts, known for developing titles such as Kanon and Air. Excluding two albums and one single that were released by Key and Visual Arts' before the label's formation, the majority of releases on the label all have a basis from one of Key's titles. There are other albums and singles on the label not directly related to the visual novels, such as two singles by Lia and one album by Riya. Unlike typical record labels, Key Sounds Label does not license any of the artists featured on albums and singles released on the label.