Soldiers have been lured away by a beautiful woman who transforms into a spider and kills them, earning her the nickname the Black Widow. Hanadate requests that representatives attend that night's military gala and pinpoint the killer. At the gala, the representatives pair off and split up. Hanadate immediately asks Zakuro to dance with him, telling her that it will be easier to watch the women while dancing. On the balcony, Agemaki tries to hide his jealousy while the twins attach magical petals to the women. They explain that they can sense the presence of anyone a petal is attached to when a twin is singing. When the dance is over, Zakuro is left by herself...