I don't usually comment, but this was just so good. I love how the characters emotions were conveyed by the artists. I don't cry often to stories, but this one got me (´；ω；｀)
Everyone keeps say it's AI or a different artist, well it isn't either. As an artist myself I can tell that their art evolved into this now because since I've been reading since around the time it came out it had a slow transition (with between seasons and everything). The parts where it looks like AI it seems whoever made this version was trying to cover a water mark with some tool that samples from the panels. And/or they're really bad at making it look like nothing was there originally.