Seriously, there's only so much you can do with pen and pencil and a sketch pad without the editing of photoshop software. There's shading, there's "coloring" on the hair and there's even hints of shadows. "Draft" aside, there's no hints on this guy even knowing how to use photoshop to edit this stuff. IF he can even make this into a vector to color it, that's an additional 20 hours of work.
This is how most yukkuri works are. A quick hour on a saturday or sunday afternoon. Some artists are more competent through other experiences, others learn through repeated exercise.
You're being kind of pedantic here about the quality. It's not shitscribbles where you're wondering if it's a nest of yukkuris or Picasso's unfinished masterpiece.
Anyways, "shit" tag added because I betcha that's what's in the bottom left panel. Feel free to remove if you disagree.
We don't normally discriminate against quality if it's about Yukkuris. Feel free to scan and submit your Saturday afternoon hand-drawn Yukkuri pictures and maybe you can inspire this picture's author to do better. P.S. If you can translate this, feel free! We're always looking for translators!
"Daddy then defeated the Mister Human in an instant!" "Dwaddy ish sho shtrong!"
"Don't Big Shish, Mwommy shaid that we must conserve mwunch-mwunch for Mishter Winter!" "Reimyu shtill wants to each shome more mwunch-mwunch, jusht a widdle more."
"Flying high!!!" "Little one fly high! Fly yu~"
4th panel This morning
"Yu! Mister munch-munch is no longer fresh, how to take it easy during winter like this?"
5th panel "Don't worry Reimu. Marisa was only gathering fresh Mister Fruit for their taste, so they are easily spoiled. Marisa will go hunt for some not easily spoiled Mister Nuts, that way we can take it easy during Mister Winter. Understand easy yu." "Mmm, understood easy yu. As expected of Reimu's Marisa, as long as Marisa is here, we can take it easy during winter yu."