"Love Song" is the fourteenth single by Japanese rock band Luna Sea, released on November 8, 2000. It reached number 4 on the Oricon singles chart. Although the song is from the Lunacy recording period, it was not included on the album.

It was Luna Sea's last single until they reunited in 2010 and released the digital charity single "Promise" in 2011. The band's first physically released single since reuniting was "The One -Crash to Create-", released in 2012.

"Love Song" was originally written and composed by Sugizo. He first wrote the acoustic guitar part and then the song's ending. The vocals came next, then the band arrangement and the guitar solo was the last part created. "Love Song" was covered by Kannivalism on 2007's Luna Sea Memorial Cover Album -Re:birth-.

"Into the Sun" is a 16-beat track, originally written and composed by J. He feels that "Anthem of Light" from Luna Sea's 2013 album A Will is an answer to "Into the Sun". The writer of both stated this as the reason the two tracks have similar rhythms and beats.

"Until the Day I Die" was originally composed by Ryuichi. Besides his vocals, the song only includes performances of acoustic guitar by Inoran and violin by Sugizo.

All songs written and composed by Luna Sea.

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