Big-breasted women resting their breasts on tables, desks, or other places where objects easily roll off is known as "paito" (breast placement). This act follows a strict rule—it's not performed by just any big-breasted woman, but only by those whose breasts possess overwhelming weight and volume. Unconsciously carried out in daily life, beautiful office lady Hikaru Nagi finds herself instinctively "placing" her breasts without realizing the effect it has. Unaware that her actions are stirring intense arousal in the men around her, her innocent behavior gradually entangles them, stripping away their rationality. Her tightly stretched clothing barely contains her massive, swollen breasts, and through paito, their realistic texture and heavy weight are powerfully emphasized. Her K-cup breasts unconsciously seduce and ensnare men. Five different scenarios unfold this unexpected, irresistible temptation of paito.