Elvenblood (Elf of the Fresh Blood (鮮血のエルフ)) written by Fujiwara Yu (藤原 祐) and illustrated by kona.
Published by the Dengeki Bunko, it has currently two volumes.

This series was dropped and will no longer be translated because it's too depressing for me.

- krytyk

Story Synopsis

What was left for the boy, was just the girl. And what the girl chose, was just the boy——

Human siblings living in a remote village, elven siblings living deep in the forest. The peace of theirs, who should not have been friends, should have continued forever. However, when the elves suddenly started an invasion on the human world, the feelings of the four were torn apart and they took different paths. Eventually the human boy——Imina, and the elf girl——Ellis, stood on the battlefield. The sword he holds is crimson. The same colour that had flowed on it, and will flow on it from then onwards...

The sharp, blood-coloured dark fantasy begins here!

Volume 1 (Full Text)

• Novel Illustrations
• Preamble - About Him
  
• Chapter 1 - Gentle Laughter in the Plains
  
• Chapter 2 - Death in Cold Blaze
  
• Chapter 3 - The Frontline Is Far, but It Will Be Here Soon
  
• Chapter 4 - Disturbing the Garden
  
• Chapter 5 - Ellis' Blood
  
• Interlude - Facing The Dawn In Sunset
  
• Afterword

Volume 2

• Novel Illustrations
• Preamble
  
• Chapter 1
  
• Chapter 2
  
• Chapter 3
  
• Chapter 4
  
• Chapter 5
  
• Interlude
  
• Afterword