You can try searching on some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of various fanfictions, including 'cheater link x reader' ones. Just use the search bar and type in the relevant keywords.
One popular 'cheater link x reader fanfiction' might be those where the reader discovers Link's cheating ways and has to deal with the heartbreak. For example, in some stories, the reader could be a character in the Zelda universe who has a relationship with Link, and then finds out he has been unfaithful with another character like Zelda herself. It often involves a lot of drama and the reader character's journey to overcome the betrayal.
First, you need to establish the relationship between the Hetalia character and the reader. Make it seem loving and believable at the start. Then, introduce the idea of cheating in a way that makes sense within the context. Maybe the Hetalia character has some internal struggles or outside temptations.
Another plot could be the reader character trying to get revenge on Sasuke. This could range from small acts of spite to more elaborate schemes. However, revenge might not always be the best option as it could lead to more problems in the long run.
One common theme could be betrayal. Since Hugh is a cheater in this scenario, the reader character might experience a sense of betrayal, which can lead to a lot of emotional turmoil and drama in the story.
One common theme is betrayal. Since it's about a cheater male, the sense of being betrayed by someone you love or trust is a big part of it. Another theme is heartbreak. The male reader usually experiences a great deal of emotional pain.
One popular 'cheater Hetalia x reader fanfiction' might be 'Broken Promises'. In this story, the character from Hetalia cheats on the reader, leading to a lot of heartbreak and self - discovery for the reader. It's a really emotional read.
Well, in such fanfictions, often there's a theme of emotional turmoil. The male reader is likely to go through a range of emotions like anger, sadness, and confusion. Also, there might be a theme of self - discovery for the male reader. He may learn more about himself and his boundaries as a result of the cheating situation. And sometimes, there could be a theme of revenge where the male reader tries to get back at the cheater in some way.
In this situation, the reader character might also decide to distance themselves from Sasuke. They could focus on their own growth and development, perhaps finding new friends or hobbies within the story world. This would show their strength and independence. For example, they could start training with other characters to become stronger, both physically and emotionally.