Aki is an active coder with a very active imagination and found strange code on a weird website. That code creates a floating status screen in the real world that lets whatever she codes happen to the real world after creating what would be a magic continent in the middle of the ocean. She removes her memories and lives her life on it, experiencing everything she created and gaining memories as she continues.
Can also be found on https://www.royalroad.com/fiction/42017/the-sudden-rise-of-the-magic-continent