収録内容

[Disc 1]

1. REASON TRIANGLE / QUADRANGLE

2. SAD SONG / QUADRANGLE

3. REASON TRIANGLE (INSTRUMENTAL) / QUADRANGLE

4. SAD SONG (INSTRUMENTAL) / QUADRANGLE

[Disc 2]

1. REASON TRIANGLE (MV) / QUADRANGLE

2. SAD SONG (STUDIO LIVE) / QUADRANGLE