Suzume Habatake, entering her fourth year of marriage. Normally serious and slightly shy, she surprisingly has a model-like figure standing at 170cm tall, revealing a voluptuous G-cup body when undressed. With a strong sex drive, she's constantly immersed in masturbation and fantasies, yet remains unsatisfied with sex from her husband. This leads her to seek out other lovers—well-endowed men capable of fulfilling her desires. Today, on a fertile day when pregnancy is most likely, a lewd and shameless story unfolds as she seeks to be impregnated by another man's sperm.