I'm married to a man with a child from a previous marriage. My stepdaughter, Miu, is a good girl who is good at studying and obedient, so I thought we had built a happy family. But one day, Miu accidentally broke a keepsake from her mother that she had treasured... At the time, nothing seemed to happen, but later she invited some male friends from school over and began instructing them to assault me! I desperately called for help, but she could only watch the scene. And from that day on, she began to be gang-raped by her daughter's classmates...