Synopsis
Nanako is a young girl who suddenly gains supernatural abilities while simultaneously losing her memories from the past. By chance, a scientific prodigy named Marlow, a hardworking high school boy with grand ambitions, is present when she obtains her powers. He convinces Nanako to work for his detective agency by offering to help her recover her lost memories. Naively trusting him, Nanako agrees, but Marlow's true motive is to exploit her abilities for the benefit of his agency and himself. The story progresses as Nanako faces a series of perilous missions and puzzling events, yet her naturally cheerful outlook carries her through each incident as she resolves one mystery after another.