A married woman named Ayumi, two years older than her husband, has been living happily ever after their marriage. However, she feels uneasy about one thing - her stepson Koudai, who is going through his rebellious phase and doesn't have any stable job or education. She worries that she can't be a good mother figure... Until now, there haven't been any other young, beautiful, and feminine women around him who are closer to his age and more attractive than his father. This makes her feel frustrated and aroused at the same time... *The contents may vary depending on the distribution method.