Eriko lives a modest life with her husband, a fellow teacher. When her husband was away on a training camp, her husband's students came and asked to teach her, so she willingly took them to her house, and that's when her tragedy began. The students suddenly change and attack Eriko. Intense circle rape, Eriko desperately tries to admonish and soothe her students, but she resists in vain and is subjected to further rape...