Some plot ideas might include America kidnapping a character who has a special power that he wants to use for his own gain. For example, if the character can predict the future, America might think he can use that to prevent any threats to the United States. Another idea is that America kidnaps a character out of jealousy. Maybe the character is getting too much attention from other countries, and America wants to keep them all to himself. There could also be a plot where America kidnaps a character to protect them from a greater danger, but the character doesn't understand his intentions at first.
One potential victim could be a small, weak nation - character. Since America is a powerful nation in the Hetalia universe, he might target a smaller nation that he suspects of having some sort of information or ability that he wants. Another could be a character who is an enemy spy in the fanfic's plot. America would want to kidnap them to get information. Also, it could be a character who has a valuable cultural artifact that America wants to 'protect' by taking the character who has it into custody.
Another interesting plot is the male reader being a diplomat from a new nation and having to negotiate with the well - known Hetalia countries. There could be a lot of political intrigue, cultural clashes, and the building of new relationships in such a story. It could also explore how the male reader's own values influence the international relations in the Hetalia universe.
One idea could be a sports competition between the characters from Hetalia and Countryhumans. They could compete in various events like a grand international Olympics - style tournament. This would bring out their competitive sides as well as show their national pride. Another plot could be a diplomatic crisis where the characters from both universes have to work together to solve a global issue, like a sudden environmental catastrophe that affects all of their 'countries'.
Maybe the Hetalia characters are time - travelers who end up in the Hamilton era. Italy could be amazed by the food and art of that time in America, while England might have some interesting interactions with the colonists, given their historical relationship. They could also influence the development of the musical Hamilton itself in some crazy, meta - way.
One idea could be that the characters from Hamilton are transported to the Hetalia world. Hamilton could use his political acumen to influence the international relations in the Hetalia universe. For example, he might try to introduce new democratic ideas among the nation - states there.
One interesting plot idea could be the characters from Hetalia encountering the creepy and often disturbing entities from Creepypasta in a haunted location. For example, Italy might stumble upon Slenderman in a dark forest. Another could be the Hetalia characters being trapped in a Creepypasta - inspired nightmare world where they have to face their worst fears, like Germany facing a horde of Jeff the Killer - like beings. And perhaps the Hetalia nations could be forced to team up with some of the less - malevolent Creepypasta characters to escape a shared threat.
One idea could be Prussia as a girl trying to break into the typically male - dominated military world in the Hetalia universe. She could face challenges and prejudices but also prove herself to be just as capable as the male characters.
One idea could be that the countries from Hetalia are somehow transported into the Naruto world. For example, Italy could end up in Konoha and his carefree attitude might amuse or annoy the ninja there. Maybe he gets involved in a mission by accident and his unique skills from being a nation, like his knowledge of different cultures and languages, could come in handy. Another plot could involve Naruto being sent to the Hetalia world and having to deal with international relations in a very different way than he's used to in the ninja world. He might try to use his ninja way to promote peace between the nations there.
In some 'Hetalia meets Anastasia fanfiction', a possible plot is that the Hetalia nations are attending a diplomatic event in Russia. There, they hear rumors about Anastasia. France, being the romantic, becomes intrigued and decides to investigate. He then discovers a young woman who might be Anastasia and tries to bring her back into the spotlight, which causes a stir among the other Hetalia characters as they debate the implications of this discovery on international relations.
A political intrigue plotline could also be fascinating. Maybe there's a situation where they have to work together to solve an international crisis, but there are other countries trying to undermine their efforts. It would involve a lot of strategy and diplomatic maneuvering between the two characters, with some tense moments and perhaps a budding respect for each other's abilities.