Us shadow people

For many years, there have been strange being that lurk in the dark, savagely attack anyone who approaches them... and who were once human beings. They are called Shadow Specters.
Lixx, however, is different from his kind. He is slowly remembering who he was before, and the most important person in his life. Little by little, he is realizing that the reason he became a Shadow Specter is far more cruel and heartless that he could have imagined.