Chiaki Shinomiya harbors a lesbian nature, feeling an intense attraction toward Miori Fujisawa, the wife of the sales department manager at Inoue Trading. Using her position as a secretary, Chiaki meticulously studies the manager's daily schedule, seizing opportunities during business trips and private moments to draw closer to Miori. Her goal tonight is to make Miori hers. As emotions and desire intertwine, the relationship between the two women begins to unfold.