I've finally got round to submitting some of my Martin Septim stories here to dA. Unfortunately, only half of them are allowed under the very strict rules on sexual content, and I recommend anyone who likes explicit M/M slash to search for this username at Archive of Our Own .
These stories feature the combination of Martin Septim/Alix de Feu, but Alix's gender is left unspecified, so you can read them as het or slash as you prefer:
Draconis - A Snippet
Guardian of His Dreams
Lighting the Dragonfires
This story features reincarnated Martin as the Dovahkiin in Skyrim:
Bleak Falls Barrow
I do, in fact, write stories about Oblivion & Skyrim characters other than Martin Septim, but they're also all too sexually explicit to be published here! Bah. There should be a proper 18+ section .