Fushi No Sougishi

this is the story of the hero who must kill the princess. this is a world where the dead are sent to the final rest by the immortal undertakes, a race of long-lived beings who look human. leon, a half-breed, is the youngest of them and is on his way to take his final test when his train falls off its tracks. he meets a human girl in the forest and though he doesn’t know her, he somehow feels he must protect her… from the other undertakers! (source: mangamo) original web manga