Senketsu no Elf

For a human boy and his sister living in an isolated village, their world was defined entirely by each other. The same was true for an elven brother and sister dwelling deep within the ancient forest. Despite the boundaries that should have kept them apart, these four formed an unlikely bond, sharing a quiet peace they believed would last forever. However, that fragile harmony is shattered when the elves launch a sudden and devastating invasion of the human realm. Caught in the chaos of war, the bonds between the four are violently torn apart, forcing each of them down divergent paths. Ultimately, the human boy Imina and the elf girl Ellis find themselves standing on opposite sides of a brutal battlefield. In Imina's hand rests a crimson sword, its blade stained with the color of the blood that has already been spilled and the blood yet to flow. As former friends become enemies and loyalties are tested by conflict, a sharp, unforgiving dark fantasy steeped in tragedy begins.