Koori no Mamono no Monogatari

In the beginning, there was a demon in a cave: Blood, trapped in ice for many decades. In order to break the curse that bound him, he searched for the "tear jewel". One day, a youth called Ishuca appeared before him. He was suffering from an illness, and had come to the cave to die. Blood was touched by Ishuca's kindness, and began to feel drawn to...