Uchuu Sensou

The story, set in the United Kingdom in 1901, centers on a photographer. In the first chapter, the photographer is on his way to deliver a finished portrait to a client when he encounters a flying object from Mars. Then, an ugly Martian appears from the craft. An astronomer who happens to be in the area tries to show the aliens that humans have no hostility toward them.

(Source: Anime News Network)