I definitely haven't seen this manga before, it's very underrated indeed.
You can clearly see the improvement in the art style, the last images you showed are a clear proof. That looks amazing. But even though I like the style in the beginning since it is quite rare. It has a weird vibe that I like.
I'll definitely look it up to read it. Thanks for the recommendation :3
Its a lengthy series, its a great manga to read this for the holidays.