The original mix of 「聞いてはいけない、言ってはいけない」 was in a key unsuitable for my voice, and it shows in the vocal performance.
For the 2023 reissue of 「健忘症」, I re-recorded the song in a key that suited my voice better. I can’t say the performance was much of an improvement.
Before that happened, I updated the mix of the original track and considered making it a bonus track on the reissue. Instead, it’s a subscriber exclusive.