アウェイクニング スペシャル・エディション · 2014-12-10 · 2 × Blu-spec CD2 · 20 positions on this issue.
“SAY GOODBYE（Off Vocal）” occupies position Disc 2 · 8, sequence number 18 of 20, on the MHCL-30275–MHCL-30276 edition of アウェイクニング スペシャル・エディション. This issue was released 2014-12-10 on 2 × Blu-spec CD2.
It follows “IT ISN'T EASY（Off Vocal）”. The next position is “BLUE AND MOODY MUSIC (WENDY'S VERSION)”.
Title and placement follow the cited official release page. The linked アウェイクニング スペシャル・エディション essay supplies musical context; this position does not independently infer writing credits, duration or a recording match with a streaming file.