Tsukino Kurahashi appears in the "Femme Fatale Ikusei Keikaku" anthology segment. She is Hiroki Adagawa's cousin. The catalyst for Hiroki's central motivation stems directly from her ex-boyfriend breaking up with her. Witnessing Tsukino's distress after this breakup drives Hiroki to a singular resolve: he will transform himself into a femme fatale to enact revenge. His specific plan involves making the ex-boyfriend fall in love with this transformed version of Hiroki, only to then reject him. Tsukino's experience establishes the foundational premise for Hiroki's ensuing actions, which include dieting, undergoing a transformation, and recruiting friends for assistance.