Under the supervision of two bosses, Ohsawa and Sasagi, Nana finds herself drawn into illicit affairs with both men. Her secret trysts with Ohsawa continue repeatedly in hotel rooms, while her connection with Sasagi deepens within the quiet confines of the office. A delicate balance is maintained among the two men and one woman—until it begins to unravel. One day, Ohsawa accidentally witnesses Nana during a secret rendezvous with Sasagi. From that moment, the previous equilibrium shatters completely, setting off a new chain of events. Ohsawa tells Nana, "I can't make love to you anymore," a statement that strikes her with profound emotional impact. Meanwhile, Sasagi's pursuit of Nana intensifies, his feelings growing increasingly passionate. Amid the urban office landscape, the lovers' affair sprouts in the quiet gaps of daily life, rapidly deepening and transforming beyond control.