Masaya Kakei, a university student leading a life of discontent, receives a letter from Yamato Haimura, a notorious serial killer of his time. The letter states, "I admit to my crimes, but the last one is a wrongful accusation. Would you prove my innocence?" Asked by Yamato, who
was not only a popular baker in the community but also a good understanding figure to Masaya, he begins to reinvestigate the case. As Masaya learns about the negative chain lurking in his life, he finds himself inexplicably drawn to Yamato... What cruel truth will each choice unveil?