Iinuma Kouichi and Aikawa Miyu were dating. Miyu was a source of pride for Kouichi. She was intelligent, beautiful, excelled in academics, and had an attractive figure with ample breasts that captivated the attention of boys. Kouichi felt fortunate to have such a desirable girlfriend. However, Miyu's attitude suddenly changed. She started avoiding Kouichi and stopped meeting him as often. Kouichi couldn't understand the reason behind this behavior. Meanwhile, Miyu was being deceived and seduced by Kouichi's father, Takeo. They engaged in repeated sexual acts. Miyu endured being penetrated by the enormous penis of her boyfriend's father...