A prevalent theme is acceptance. Marco has to accept Tom's devilish nature, and Tom has to accept Marco's human quirks. Also, the theme of adventure often comes up. They go on all sorts of adventures together, which helps strengthen their relationship. In some fanfictions, there's also a theme of self - discovery, as they learn more about themselves through their relationship with each other.
Well, often there might be a theme of growth. Maybe Marco and Tom learn important life lessons while taking care of the pet. It could also be about family. The pet could be seen as a part of their extended family, bringing them closer together. In some cases, there could be a mystery theme. For example, the pet might have some special abilities or be involved in a mystery that Marco and Tom have to solve.
One common theme is possessiveness. Tom, in his yandere state, is often extremely possessive of Marco. He doesn't want anyone else to be close to Marco and will go to great lengths to keep others away.
The interesting part could be the exploration of their relationship in a different light. Since lemon usually implies a more mature or romantic aspect, it can show a deeper emotional and physical connection between Tom and Marco that might not be as fully explored in the original source material.
Another theme is self - discovery. Both Tom and Marco are on a journey to figure out who they are. In the context of their relationship, they help each other in this process. Like, Tom might help Marco embrace his more adventurous side, while Marco helps Tom control his temper.
Well, the theme of acceptance is quite common. Tom, with his demon nature, and Marco, with his own quirks, learn to accept each other fully. Also, adventure is a popular theme. They might go on quests together, facing challenges that strengthen their bond. For example, in many fanfictions, they have to battle supernatural forces and in the process, their relationship deepens.
The unique dynamic between Tom and Marco makes tom x marco fanfic interesting. Tom is a demon with his own set of powers and personality quirks, while Marco is a human with his own goals and values. When they interact, it creates a lot of potential for interesting stories.
A common theme is friendship turned into something more. Their initial relationship as friends or rivals often evolves romantically. Another theme is self - discovery. As they interact more, both Tom and Marco learn more about themselves. Also, acceptance is a theme, especially in terms of accepting each other's flaws.
One common theme could be the exploration of their relationship. How they first meet, how they overcome obstacles in their relationship due to their gender or the world they live in. Another theme might be their personal growth as individuals within the context of the relationship.
One popular tom x marco fanfiction could be 'The Unlikely Bond'. It explores how their relationship develops in a unique and interesting way, with them going on adventures together and gradually realizing their deep connection.