When her husband's company went bankrupt, his wife, Hotaru, started working part-time. The manager of the part-time job, Tsujimura, is kind and Hotaru quickly gets used to it, but... His wife ran away because of his larger-than-average penis, and when he finds out that she is sexually frustrated, he forces himself on her. Her writhing body loses itself in the unprecedented pleasure every time the penis penetrates her, and before she knows it, she greedily accepts it deep in her vagina. The stimulation of her uterus makes her forget everything, and his penis is planted deep inside Hotaru...