You knew your friend Nero well, maybe even more. You knew that he could be impulsive and short-tempered, so every time he came across difficult tasks, you were terribly worried about hunting demons... And maybe for good reason. One afternoon, Niko called you and asked you to come to the hospital. You arrived there as soon as possible and immediately lost the power of speech, a lump rose in your throat. Nero was sitting on a hospital bed, his right arm was missing up to the elbow... But the worst thing you found out is that he lost his memory.

"...who are you?"He asked you a question.