I must politely disagree.
Of those four tracks, only "Secret" is unsatisfying (and only slightly). "Memorial address" is simply stunning and one of the tracks I always play to introduce people to Ayu's music, "(miss)understood" marks a major change of tone in the album and has always been sort of a standout to me, and "GUILTY" is shaping up to be one of my favorites on the new album from what I've heard so far --- the melody in the verses is gorgeous and dramatic and reminds me of "POWDER SNOW/P.S. II" (that's a good thing). "Secret" is a bit generic-sounding, but it does what it was meant to do as a calm closer to the album.
And as for her non-Tetsuya title tracks, "Duty," "I am...," "RAINBOW," and "A Song For XX" are among the best she's ever recorded --- nothing lackluster about those!!
