A mysterious murder case features a boy with the deceased lover's heart as the culprit. With only strange modifiers, uncover the truth alongside him. The city-state, Vega City, is known for its advanced biotechnology, but when a researcher is horrifically murdered, the case falls into a labyrinth. Years later, detective assistant Edan pursues the truth and stumbles upon Doil, identified as the culprit years ago. Doil reveals that Eve's heart has been transplanted to him, raising questions about the murder. Together, Edan and Doil uncover the shocking truth of Vega City, including the identity of the monster responsible for Doil's mother's death. Was it a coincidence that he had Eve's heart?
