Shiho, a mother, works hard to earn money for her son, Yasushi's, college tuition. One day, she comes home to find Yasushi being assaulted by some young strangers. Rushing to intervene, she learns that her son has been bullied at school. Shiho, unable to hide her shock, is met with the raising of her hands by her classmates. Shiho tries to stop them, but these despicable men not only hit Yasushi, but also take a look at Shiho's voluptuous body right in front of her eyes...