Osamu, a young man, died at a young age due to an incurable illness. His second life was to drift as a spirit (demon) in an unknown world! Osamu, who is hated by humans and unreasonably deprived of his life, hopes that he “does not want to die anymore”. At that time, he gained the power of “life-sucking” that feeds on the vitality of others. In addition, he will resist the approaching “death” by using the science…