I love this threads! Its priceles the help that we recieve from each other n_n
Also, before starting, I suggest for when you do my critique, check the first and the last updated chapter. Maybe some of the things that may call your attention on the first chapter are already solved on the last one.
Now, your thing.
-As your work so far is in old japanese scroll style, its hard to tell you in what you have to get better, because you are following an already known model, and I don't know if the generality of your comic will follow that style. In essence, we have not seen your comic yet, but only the prologue, so the critique may be a bit lacking.
-About what I have noticed, though, is that you need to pay attention to your lineart. The weight of line is almost null in all the drawings, and sometimes you change the brush without reason, like here:
Also it would be a good exercise to practice some deept of field, to really grasp the distance between the roead, the house, and the open door.
The dept of field is specially important when you do action poses, like Yué's character profile on the end of 'part 1'. Here it would be good if you could reference from real images, trace even (its not bad, really) or create your own models to follow, be it with DesignDoll, or taking pictures with the eye fish effect of a figurine like Body Kun, or a TBLeague figure. Or whatever figure you have really. It doesn't have to be from an specific brand.
-Enough with the bad, The great thing is that you rock in proportions, mostly (until you play with weird camera angles, that's is). The grandma in chapter one is very well done, not only on proportions but also all her wrinkles. What lacks, though, is shadows. Shadows are always hard, I know, but if you don't want to add them, you can also just add light to have the same effect of depth on an otherwise flat character.
-Absolutely great work on the sound effects. I read that some people found that distracting, and I understand their opinion, but for me its a great way how you improvised and resolved the issue. You brought life into your work, in a way that its not common in manga works, so kudos for that. It may we difficult to read, but I think that it adds to the idea of background noise, as opposed to the big onomatopeias, like BOOMS usually are.
-Lastly. Be consistent. First submission was on august 2018, and you are asking now in 2022 what we think about this. If you were practicing during those years, you may already be way above what has been submitted, so try to shows us something current from your work, so we can see and talk about that. Maybe everything that we are talking now is futile because you are way above that in the present.
That's all I can say about your work.
Good luck in your plans!