A raped woman appears before Kyoko. Natsumi, the boss of a gang of delinquents she knows, and her friends are also raped and humiliated by a rapist. Apparently, it is the same rapist. And it is a duo. As Kyoko and Natsumi begin to make their move, they discover that a mysterious beautiful girl named Emu is involved in the case. Kyoko also receives a letter from the rapist warning her about the case. Despite police security, Kyoko falls prey to the rapist, but manages to wound the perpetrator. However, a man is found dead with the same wounds... The case takes an unexpected turn when an unidentified person named “Dead Angry” becomes involved.
The Internet, where anyone can easily come and go. In this virtual cyber world, a magical being with a will lives.... A strange rumor whispered among net surfers. It was a rumor that if one accessed the address "siren", he/she could experience virtual sex with a beautiful girl living in the Internet. In reality, however, those who access the address invariably disappear mysteriously. Ohtaka, who works for a computer software production company, heard this story from a colleague and at first thought it was ridiculous. One day, however, he goes missing, leaving behind a note with the address of "siren".