Yuria, the wife of her husband's colleague, fell ill and had to take care of the children. Yuria, who had no children, was confused, but enjoyed her new life. Even though she was still a child, her brothers with strange sexual knowledge all targeted the busty Yuria and turned her into a sow's semen tank. What is the future of Yuria, who was obsessed with repeated sexual training every day and became a prisoner of Masegaki, awakening her female instincts?