Hai to Diamond(灰とダイヤモンド?, "Ash and Diamond") is the first full length album by Japanese rock/pop band Glay. It was released on May 25, 1994, and peaked at #26 on the Oricon chart, with more than 100,000 copies sold.
"Rain" was written and co-composed by Yoshiki, who also owns the record label that released the album, Extasy Records. It and its fellow singles, "Manatsu no Tobira" and "Kanojo no "Modern..."", were all re-recorded for their second album Speed Pop. "Manatsu no Tobira" was used in the 1994 anime Yamato Takeru. It was also covered by v[Neu] for the compilation album Counteraction - V-Rock covered Visual Anime songs Compilation-, which was released on May 23, 2012 and features covers of songs by visual kei bands that were used in anime. "Kanojo no "Modern..."" was covered for Crush! 3 - 90's V-Rock Best Hit Cover Love Songs-, which was released on June 27, 2012 and features current visual kei bands covering love songs by visual kei bands of the 90's. It was performed by Crash49, a one-off supergroup consisting of Mitsu from v[Neu], Yoshihiro from Guild, Aki from -Oz-, Karin from Nogod and Hiroki from D.