[DeepL Translation - needs review] Volume 1 Introduction: Once upon a time, I was a demon. After a six-month disappearance, a high school student, Yusuke Saito, has lost all of his memories. One day, his peaceful life with amnesia is abruptly broken. One after another, people who know about the past and avengers appear. The moment he is condemned for a crime he does not remember, he sees a phantom of a blade thrust into dead flesh. Now... Who did I kill?
(Translator: DeepL)
