Alc αA dia (アルカ ディア) forms
V. Makishi / G. Sayuki†Hime / G. Hinagi / B. San
Live tour, Hasen no Kouchiku (破旋の構築), begins
Last live with current lineup, “Tsumugu” (“紡”), is held at Urawa (浦和) NARCISS
V. Makishi, G. Hinagi, and B. San secede
Bassist Ibina†Meruri is recruited
G. Sayuki†Hime / B. Ibina†Meruri
Vocalist Seijuu is recruited
Bassist Ibina†Meruri (Ibina†姫璃瑠) changes the spelling of his name to Imina†Meriru (諱†めりる)
V. Seijuu / G. Sayuki†Hime / B. Imina†Meruri
The band's label is changed to Office Alc<αA>dia
Second period of the band begins: Alc<αA>dia
Drummer Yururi†Miruku joins
V. Seijuu / G. Sayuki†Hime / B. Ibina†Meruri / D. Yururi†Miruku
Live tour, ~Risoukyouhe no Tabidachi~ (~理想郷への旅立ち~), begins at Takadanobaba (高田馬場) AREA.
Tour final is held at Takadanobaba (高田馬場) AREA.
Vocalist and drummer secede. The band pauses activity.
Alc αA dia pauses activity
Bassist sell joins
G. Sayuki†Ki / B. sell
Drummer Kiri joins
G. Sayuki†Hime / B. sell / D. Kiri
Alc(α)dia resumes activity.
Vocalist kiki joins
Guitarist Sayuki†Hime changes his name to Sayu
V. kiki / G. Sayu / B. sell / D. Kiri
Alc(α)dia begins playing secret lives
Alc(α)dia restarts official live activity
Alc(α)dia last live?