I recently registered my marriage with a man who has a child from a previous relationship. Because my stepdaughter, Miwa-chan, is at an age where she's becoming more mature, it seems it will take some time to become close. But I was supposed to be spending my days in a happy family... One day, Miwa-chan started instructing her male friends from school to attack me!! Even though I desperately asked Miwa-chan for help, she just looked at me being violated with a smile of contempt. And from that day on, my days of being gangbanged by my daughter's classmates began...