Cat Legend is a long-runner, having been started in 2003. The beginning few chapters look messy and the mix of traditional and digital artwork looks clumsy. However, the artwork quickly begins to improve after the artist switches completely to digital, and it continues to improve upon itself in the more recent chapters. The story itself is (mostly)lighthearted and fun, and the timeline doesn't take itself too seriously. While sometimes the storytelling can get a bit confusing, it tends to explain itself with the use of different characters telling different parts of the story. And the cast is large and different from each other.
I strongly encourage reading Cat Legend, because it is worth getting through the earlier chapters to see the story and characters as the art evolves.