"Who is that girl?" After the beautiful girl "Fujino Akane" accidentally fell to her death, a girl who claimed to be "Azuma's" twin sister "Sakura" suddenly appeared in front of the writer Mizoroki one day. The girl named "Sakura" looks exactly like Akane, but no one can confirm her origins. Mizoroki, who is eager to find the connection between the two, is also stuck in the quagmire because of the plagiarism incident and cannot extricate himself. Mizoroki, who plagiarized Akane's novel, accepted the proposal of Sakura, who claimed to have the original manuscript of the plagiarized novel, and was gradually forced into darkness. At the same time, the relevant editors and the detectives responsible for investigating the truth of "Azuma's" death are also chasing behind. The mystery surrounding these people is becoming more and more difficult to solve———