This is Miyasaka Takaji's latest doujin, uploaded for free on his Fantia. It's his first non-erotic work and he mentions in the afterword wanting to do more stuff like it in the future. It seems to be a sequel to one of his previous doujin, Dark Elf wa Enya ni Odoru. So, if you need a more erotic story involving this cute, brown elf, you can read it here: /g/2787984/dbd4ec11a9/ Also available in English here: /g/998736/632feb29b3/
The doujin can be downloaded here: https://fantia.jp/posts/2781563 You can support his Fantia here: https://fantia.jp/fanclubs/3112