Another theme could be the exploration of different powers. The male reader might have some unique abilities that interact with Mercy's healing and resurrection powers in interesting ways. For example, his power could enhance her healing range or something like that. It makes for an exciting dynamic in the story.
One common theme is adventure. The story might involve the reader and Mercy going on some sort of heroic adventure together, facing challenges and saving the day.
Adventure is also a popular theme. The male reader and Mercy might go on a mission together, facing various challenges and enemies in the Overwatch universe. This allows for a lot of action - packed scenes as well as opportunities for their relationship to grow. For example, they might have to rely on each other to survive in a dangerous situation.
Another option could be Tumblr. There are many fanfic communities on Tumblr where fans share their works, including 'mercy x reader' fanfics. You might need to do some digging by using relevant tags, but it can be a great source.
I really like 'A New Beginning' in the 'Mercy x Reader Fanfiction' genre. In this story, the reader character is a new recruit in Overwatch and Mercy takes them under her wing. It's full of cute interactions and the development of their relationship is very well - written. Also, 'Mercy's Trust' is interesting as it delves into how the reader gains Mercy's trust over time.
There might be a 'male reader x mercy fanfic' where the male reader is a soldier. Mercy saves his life during a fight, and he then becomes determined to protect her in return. This could lead to a series of adventures and a growing relationship between them.
Well, in general, 'mercy x reader' fanfiction often focuses on the relationship between the character Mercy and the reader. It might include elements like shared adventures in the Overwatch universe.
You can start by looking on Archive of Our Own (AO3). It has a large collection of fanfictions, and you can easily search for 'Mercy x Reader' ones. There are usually a lot of well - written stories there. Another place is FanFiction.net. It has been around for a long time and has a decent selection as well.
Another place to look is Tumblr. There are many Overwatch fanfic communities on Tumblr. While it might take a bit more searching compared to the dedicated fanfic sites, you can find some really unique 'Overwatch Mercy x male reader fanfic' that might not be as widely available elsewhere. Some Tumblr fics focus on the more romantic and tender aspects of their relationship.
Well, it's possible that there could be such a fanfic. However, I haven't personally come across one. These kinds of fanfics often depend on the creativity and interests of individual fanfic writers. Some writers might explore this kind of scenario for the characters Mercy and Genji, but it's also likely that it might be a rather niche concept within the large world of fanfiction.