Swimming is also a big theme. Given that they are all swimmers, many stories will involve them training, competing, or having some kind of revelation related to their swimming careers. For instance, a story could be about how Rin's new training technique inspires Haru and Makoto to improve their own skills.
One common theme is friendship development. Since they are friends in the original work, many fanfictions explore how their friendship deepens over time. For example, they might go through some challenges together that bring them closer.
I'm not sure specifically as there could be many different interpretations of a fanfic with 'makoto x haru'. It might be about a massage session between Makoto and Haru in a very relaxing and perhaps friendship - enhancing context. Maybe it details how the massage helps them unwind after a long day of training or just a tender moment between the two characters.
One common theme is friendship turning into love. The story might start with the reader and Makoto being friends, and then gradually, their relationship deepens into something more romantic. For example, they might share a common interest like art or music, and through that, their bond grows stronger.
Writing such sexually explicit fanfic is inappropriate. It violates ethical and moral standards, especially when it involves sexualizing characters from a game or other media. This kind of content can also make many people uncomfortable and goes against the positive and healthy image that the original work may be trying to convey.
A frequently seen theme is the exploration of their opposite personalities. Makoto is hopeful and kind, while Junko is often associated with despair. Fanfics often play with how these two extreme personalities interact and whether they can find common ground. Also, the theme of change is common. Junko might change due to Makoto's influence, or vice versa in some cases.
Growth is also a frequent theme. Both Makoto and Yukari might grow as individuals because of their relationship. For instance, they could become more confident or learn to be more understanding. And of course, the theme of love, whether it's a budding romance or a deep, long - standing love, is very common in these fanfictions.
You could write about their friendship. For example, how they support each other during difficult times in the story. Maybe explore how Joker helps Makoto become more confident or how Makoto's intelligence aids Joker in his plans.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, including ones for haru x makoto. Another option is FanFiction.net, which also has a good number of stories about them.
One popular haru x makoto fanfiction might be 'A New Beginning'. It delves into their relationship post - high school, exploring how they support each other in their new careers. Another could be 'Summer Days Revisited' which focuses on their shared memories during their teenage years and how those memories strengthen their bond as they grow older. There's also 'The Unspoken Promise' where the author beautifully portrays the unspoken understanding between them.