Based on a popular web-released manga series by Hidekazu Himaruya, this has been described as a "cynical gag" story set in Europe in the years between WW1 and WW2 (1915-1939), using exaggerated caricatures of the different nationalities as portrayed by a gaggle of bishōnen boys. For example, the Italia Veneziano character is into pasta and women. Italy, once home of the strongest empire in the world, has changed. This is the story of Italy, now a cowardly pasta-loving fool, and his friends (other personified countries of the world) as they live through strange moments in world history.
Meet Japan. He's the newest ally to Italy and Germany, and a powerful nation in his own right. But with having been isolated from the rest of the world for over 200 years, what he sees as his "normal" behavior comes off as extraordinary to others.
As Sal Valentine's Day gets closer, Germany tries to figure out his relationship with Italy. Meanwhile, Austria tries to come up with a gift for his ex-wife Hungary.
Germany asks Italy out on a date, while Austria and Hungary realize that Germany has been basing himself on a book to help with proposals.
Almost two hundred years after America declared independence, England decides to do something for his birthday (despite the topic of America's independence making him ill).
Back in the time when Liechtenstein still had long hair, she was cared by Switzerland, who continued his guard from the other countries (whom he called "those idiots.") While so, she wondered how her brother maintained his independence for hundreds of years, even though he was surrounded by great, powerful countries.
The Germans' attempt at training the Italian Army doesn't go as planned, as they soon find that the men are quicker at the art of escape, rather than combat. Later: It's just another day in the life of Germany, as he attempts to brave the wait and chaos in a never-ending line at the supermarket.
Estonia falls asleep at the World Meeting, and upon awaking he discovers that all the nations have turned into women.
After being defeated by Germany, a frustrated England vows to get revenge with the strongest method known to man: Summoning the devil to lay a curse on him. Will he succeed in his ritual, or get something even WORSE than what he expected?
Some days, Italy just can't get a break. Especially when he winds up tricked and kidnapped, not once, but twice by the Allied Forces. But once Germany gets involved, it seems the third time may be the charm... though in whose favor, exactly?
Italy is sent back home after annoying Germany, but Germany quickly finds that ditching the cowardly nation is a task easier said than done. Especially when WWII nears and Italy takes it upon himself to declare that he's now Germany's ally.
In the climax to the Chibitalia sub-storyline, Holy Roman Empire gives the younger Italy the ultimatum: Will he become the new Roman Empire with him or not? Later on, in 1940, England finds that he still has friends outside of the Allies to count on to cheer him up...
America decides to finally enter his long-abandoned storage room to clean it out, but the memories he finds in there may prove to be too hard to let go of.
"England, I have something to tell you." In a brief jump forward to 1956, a gloomy and war-torn France proposes to England, who quickly learns the "joke" is indeed on him... and he won't go down that easily. Back in 1940, the Axis Powers train to take on England, and Italy gets a quick and confusing lesson in "culture clash".
Germany reflects on times spent around Austria. Meanwhile, unbeknownst to the three stranded nations, they've got company on the island and are being watched from afar, even when they're roasting marshmallows at their campfire.
It's WWI, and Germany, in search of the heir to the legendary Roman Empire, discovers an abandoned tomato crate sitting in the middle of the woods. Germany finds himself unprepared to deal with the strange descendant of Rome.
It's the "Meeting of the World", and all nations must come together to solve global problems. However, after America starts the conference off on a bizarre note, can the gathered nations even solve the problems they have with each other? After this, it's a leap back in time to World War One.
The Allied Forces meet to discuss plans to take down the Axis, but despite their image as a "team" (America as the "hero" and everyone else acting as his backups), they find it difficult to get along and agree with each other.
The Allied Forces make their move and attempt to take down the Axis, but wind up constantly distracted by a "special guest" on the island, a supernatural stranger that Italy seems to know rather well...
Italy introduces his older brother, Romano (who represents the southern half of their country), to Germany. But while Italy himself can't get enough of Germany, the foul-mouthed Romano will try anything to make sure that the "potato freak" stays away from his brother. Anything.
After he winds up uninvited to the second Allies meeting, France reflects on his history of past "glories" and "accomplishments".
An endless blue sky, white clouds, and a shining sea. Normally it would be an average trip to the beach. Germany, Italy, and Japan have been stranded on a mysterious island in the southern sea, their S.O.S message having gone ignored as the three of them make the most of their vacation.
Japan struggles to fit in with the Axis and their strange foreign culture and behaviors, while Italy attempts to help him adjust to life outside of his own land.
In a tale of times past, a younger China meets a strange small nation known as Japan. He takes it upon himself to try to raise Japan as his younger brother, but soon discovers that there's more to the growing youngster than he thought. And he may not be prepared to deal with the sudden changes...
Sealand, the world's smallest "nation", attends a world conference in an attempt to be recognized, but finds that respect and acknowledgment from the others is harder to obtain than he thinks.
Liechtenstein adjusts to her new life with her brother Switzerland. Elsewhere, Italy gets stuck in an embarrassing situation with his own brother.