Kannagi no Tori

There is a place known as "Kannagi-san" (or Kannagi Mountain), which connects the world of the living with the world of the dead. Here, beings called the "Kannagi no Tori" (or Birds of Kannagi) live, and it is their job to take the souls of the people who die to Kannagi-san, where they can then pass on to the world of the dead. The "Kannagi no Tori" get sent out just before someone dies to retrieve their soul and bring it back. However, one "Kannagi no Tori," Ikaru, is different. He feels wrong...