At 22, Asumi Kimura is rescued by Atsushi Nakajima and Kyouka Izumi of the Armed Detective Agency from a dangerous situation. With severe amnesia and fragmented memories, she is brought to the agency for safety and evaluation. Recognizing her potential and the risks of her unknown past, Fukuzawa offers her a position within the agency. This role helps Asumi rebuild her life, use her abilities, and slowly uncover the truth about her identity as she faces new challenges and mysteries. She will also discover the truth behind her ability and the truth that she possesses a variety of supernatural, magic-related powers and abilities and what's her ability's name throughout their journey.