Lunacy is the seventh album by Japanese rock band Luna Sea, released on July 12, 2000. It reached number three on the Oricon chart and was the band's last original studio album before disbanding in late 2000. The album was remastered and re-released on December 19, 2007, it came with a DVD of the promotional videos for "Gravity", "Tonight" and "Love Song".
"Gravity" was used as the theme song for the Japanese film Another Heaven. It has been covered live by Inoran himself during his solo career, and was also covered by American pop rock singer Marié Digby for her 2009 album Second Home.
"Tonight" was used as the theme song for the WOWOW broadcast of the UEFA Euro 2000. Also it has been covered live by J and Inoran themself during their solo careers.