In March 2003, D was formed with their initial lineup of vocalist Asagi, guitarist Ruiza, drummer Hiroki, guitarist Sin, and bassist Lena. They released their first EP, New Blood on July 18. Soon after its release, Ruiza was hospitalized for an unknown illness and Sin decided to leave the band. D went on a short pause of activities from that point, however Asagi and Hiroki continued to play concerts under the name "Night of the Children" with a support guitarist, Hide-Zou. Once Ruiza was released from the hospital on September 27, D officially resumed activities with Hide-Zou replacing Sin on guitar. Two months after their reunion, they recorded their first single "Alice" which given away for free at only one show in Tokyo that November. On Jan 7 of the following year, they released their second EP Paradox.
During 2004, D released another EP Yume Narishi Kuuchuu Teien, as well as a single entitled "Mayutsuki no Hitsugi", which was only for sale at three concerts in November, in Tokyo, Nagoya, and Osaka. They also released a remastered version of their first EP, with a previously unreleased track "Gareki no Hana". New Blood: Second Impact was released on December 8 of that year, quickly followed by their fourth single, "Mahiru no Koe: Synchronicity".
In 2005, Lena remained in the band long enough to release one more single and promotional video, "Yami Yori Kurai Doukoku no a Capella to Bara Yori Akai Jounetsu no Aria". On July 27, after finishing the recording of forthcoming album, Lena left the band. They released their first full album The Name of the Rose on September 28 in two versions, each packaged with a DVD containing a different promotional video. D also launched their own publication called Mad Tea Party Magazine on August 7.
On December 5, 2005, Tsunehito joined as the new bassist. The band re-released their first full album The Name of the Rose, with re-recorded bass tracks by Tsunehito. The updated album contained three extra tracks that were considerably rare: "Shiroi Yoru", "Tsukiyo no Renka", and "Mayutsuki no Hitsugi". Keeping with the trend of remastering their old albums, in 2006 D re-released their EPs Paradox and Yume Narishi Kuchuu Teien. The latter came with two additional tracks that were previously unreleased. Their seventh single, "Taiyou wo Okuru Hi", was released in two types: a limited edition with the promotional video for the title track, and a regular edition with an instrumental version of the title track. Two months later they released their second album, Tafel Anatomie on October 18.
In 2007, D launched an official fan club Ultimate Lover, and released their first DVD of live concert footage, Tafel Anatomie: Tour 2006 Final on March 14. Soon after, the band announced in-store events and a three-date tour in Osaka, Nagoya, and Tokyo on their website to support their "Dearest You" single to be released on April 25. In the summer, D had a dual single release campaign, with "Ouka Sakisomenikeri" released on July 18 and "Schwarzschild" on August 15. On November 7, they released their third full-length album Neo Culture: Beyond the World with an expanded version of their usual multiple-version marketing tactic; buyers could choose from two special editions each containing a DVD with different promotional video, and a regular edition with a thirty-six page booklet.
D signed with the major record label Avex Trax in 2008. Their last indies tour was called Follow Me, and a DVD of footage from the final concert was released later in July. Their first major single called "Birth" was released on May 7. Their second major single, "Yami no Kuni no Alice/Hamon", was released on September 3. The title track was used as the theme for the Japanese movie "Twilight Syndrome: Dead-Go-Round", and the b-side track "Hamon" was used as the ending theme for the Nintendo DS game Twilight Syndrome. Their first major label-sponsored concert entitled Birth: Sora e no Kaiki was held on August 8, followed by their year's end Alice in Dark Edge tour.
Their first activity of 2009 was the release of their third major single, "Snow White". Then on February 25, they released their first major full-length album titled Genetic World. In the months following, they released a special combination concert photo book and live album D Tour 2008: Alice in Dark Edge Final, and a live DVD D Tour 2008: Alice in Dark Edge in March.
D's tour for Genetic World kicked off in April 2009 and ended that May. In September, Asagi opened a website for his company Rosen Kranz (Japanese) (God Child Records). Soon they announced the revival of Mad Tea Party Magazine, and it was decided that eleventh volume and eighth special edition photo book would be released on October 13. D's fourth major single "Tightrope" was released on September 23. A previously unreleased song "Day by Day" was soon announced to be the theme song for a dating simulation game for Japanese mobile phones called LoveφSummit, part of the Neo Romance series from KOEI, as well as the title track of a new single that was to be released on December 2.
The band's first single of 2010, "Kaze ga Mekuru Peji", was used as the opening theme for the television drama Shinsengumi Peacemaker, aired on TBS and MBS, and was scheduled for sale on March 10. Their second major album, titled 7th Rose in honor of their seven years of activity, was released later that month. A compilation DVD containing footage from their short television program Bara no Yakata, and several promotional videos from their independent and major releases was also released on March 31.Their last single, entitled "In The Name Of Justice", was released on November 17th, 2010. It featured two special editions, one carrying the PV of "In The Name Of Justice", other packing "the making of" the title track, also including "Grand Master", and a CD Regular edition featuring "Yoru no Me to Ginyushijin"
, born on August 29 in Noshiro, Akita, is the vocalist, lyricist, and one of the main songwriters of D. Previously in the bands Balsamic (1994–1997), Je*Reviens (1998–2001), and Syndrome (2001–2002), he was also in a side project called Kochou with Tinc's drummer Takuma, formerly known as Shion in Syndrome. He founded the company God Child Records in 2006, under which D released most of their independent era works. He released a solo single that year entitled "Corvinus", and also developed a perfume of the same name, under the God Child Records subsidiary Rosen Kranz.
, D's guitarist and other main songwriter, was born on February 18 in Itami, Hyougo. He was previously in the bands Distray (1996–1999), Laybial (1999–2000), and Syndrome. Ruiza has also released two solo EPs, Ao no Hahen in 2002 and Amenity Gain in 2006.
, born in Kanagawa on November 19, is the second guitarist of D. He was previously in the bands Lapis (1995–1997), Clair de Lune (1997–2000), As'REAL (2000–2002), and S to M (2002–2003)
D's current bass player, was born on March 5 in Yokohama, Kanagawa. His previous bands include Relude (2001–2003), Givuss (2003–2004), and Scissor (2004–2005)
was born on July 20 in Gunma, and is the drummer of D. He was previously in the bands Overtaker (1998–2000), Michiru Project (2001–2001), Aioria (2001–2002), and S to M (2002–2003).