The anime-only rule has changed over the years in this site. Western art style done by non-Japanese artists that are well received here are more common than you think. This is no different.

Good drawing. Interesting idea.
Bruce fucking Lee.

Then what about the hundreds if not thousands of non-anime art here on Danbooru?

Violating Danbooru criteria: "Danbooru is an Anime Art Gallery first, and a high-quality gallery second."