KOROSHI (コロシ) forms.
Around this time, the band joins Matina Eternal.
V. Shuri (殊璃) / G. Shin (慎) / B. Aika (あいか) / D. Rouji
At unknown times and in unknown order: bassist Aika (あいか) changes his name to Kento (絢斗) and switches to guitar; guitarist Shin (慎) switches to bass; and new guitarist Yui (萸威) joins.
V. Shuri (殊璃) / G. Yui (萸威) / G. Kento (絢斗) / B. Shin (慎) / D. Rouji
KOROSHI (コロシ) disbands
Vocalist Shuri (殊璃) changes his name to Saki (咲); guitarist Kento (絢斗) changes his name back to Aika (鴉嘩) [a slightly different spelling]; guitarist Yui (萸威) changes his name to Riku; and bassist Shin (慎) changes his name to Shinkichi (慎吉).
First live after the band's name change is held.
Around this time (date unknown, but sometime before the PV released on June 25th), guitarist Riku secedes.
The band joins CLIMAX ENTERPRISE.
First sponsored event after name change is held. A memorial sticker is freely distributed to attendees.
First free oneman is held (sold out). A VHS is freely distributed to attendees.
Drummer Rouji secedes.
Guitarist Mayoi (真宵) and drummer Yuuki (悠生) officially join.
V. Saki (咲) / G. Mayoi (真宵) / G. Aika (鴉嘩) / B. Shinkichi (慎吉) / D. Yuuki (悠生)
Around this time (date unknown), drummer Yuuki (悠生) secedes. Sometime after, A×shi (亜×師) begins as support drummer.
V. Saki (咲) / G. Mayoi (真宵) / G. Aika (鴉嘩) / B. Shinkichi (慎吉) / Support D. A×shi (亜×師)
Around this time (date unknown, but sometime before Imperial), drummer Junna (准那) joins.
V. Saki (咲) / G. Mayoi (真宵) / G. Aika (鴉嘩) / B. Shinkichi (慎吉) / D. Junna (准那)
Guitarist Mayoi (真宵) secedes
Around this time (date unknown, but before photograph), guitarist Mayoi (真宵) secedes.
V. Saki (咲) / G. Aika (鴉嘩) / B. Shinkichi (慎吉) / D. Junna (准那)
Cuartet disbands
One-day revival(?) is held.
Temporary revival tour, Cuartet Family no Minasamae ~Shochuu Omimai Moushiagemasu~ (Cuartet Familyの皆様へ~暑中お見舞い申し上げます~), begins.
V. Saki (咲) / G. Mayoi (真宵) / G. Aika (鴉嘩) / B. Shinkichi (慎吉) / D. Junna (准那)
One-day revival is held.
One-day revival, -ONE-MAN OF LIMIT NIGHT- LAST MESSAGE~Seishun no Uta~ (-ONE-MAN OF LIMIT NIGHT- LAST MESSAGE~青春の唄~), is held.
Cuartet was a visual kei band. They were part of the kote kei and koteosa kei subgenres. They were active from 2002 to 2005 and are now disbanded.