Art my Hidekazu Himaruya
The characters are Germany and Prussia from Hetalia
Cute, a picture of Germany and Prussia when they were little!
((Actually, this is Prussia and Germany during the 19th century. You can see it because the clothes they wear are the Pickelhaube, which is a famous part of the Unification uniforms, and the typical military outfit that you often see on my askblog. Therefore Prussia must be an adult in this picture, while Germany is a teen. The date is roughly 1866 -1871, and is either referring to the Franco-Prussian war or the Seven Weeks War (also known as the Austro-Prussian War), which were part of the Eingungskriege (Unification War) of Germany.
Since Prussia is protective yet arrogantly laughing, I believe this refers to the defeat at Königgrätz, but I can be mistaken.))