The Black Lion Society, a dark organization whose hometown has been devastated by the Sweet Angels, has caught suspected humans and subjected them to pleasure torture called interrogation.On this day as well, the figure of a girl wandering around the city looking for her friends who were kidnapped and disappeared is Hikaru from Sweet Angels.Hikaru desperately endures pleasure torture in a state where she is restrained and cannot move, but she is swallowed by the wave of pleasure and her body and spirit fall.