After reading the lyrics translations, I think this single it's focused more on her emotions. Not like she never did this before tho lol, but it's been a while I liked so much her lyrics. Also her voice sounds raw but not weak, she's really good.
Walk and Last minute are so damn good. I could listen to them both all day long. Zutto... it's your typical lovely Ayu ballad. That's ok for me lol.
It's been a while since I have enjoyed her music so much. The last time was for BRILLANTE (lol ages ago).
Don't get me wrong. Both Party Queen and Colours were fun experiments (but imho PQ >>> Colours, anytime) and LOVE again, ugh, the only good things were the
singles mini-albums for me. But they didn't never really blow me away. They were nice, maybe good, rarely great, but overall meh..

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So tl;dr
I love this single, I'll gonna buy it for sure