There is a secret group that makes a living by providing support. - Their name is ``Sweet Angels.'' The actual situation is not clear. - The Black Lion Society, whose local area has been devastated, has been capturing suspicious people one by one and training them in the name of interrogation, with the aim of destroying the prostitution ring. - As the Black Lion Society's net is spread over a wide area, Natsu, who is worried about the safety of his missing Sweet Angels comrades, searches alone, and gets information and enters the Black Lion Society's hideout...