A Chain of Cursed Murders [チェーン 連鎖呪殺]

Some high school girls receive an mail in they are told about a girl who was raped, became pregnant, and murdered by a group of men. Mail asks them to resend the mail to 9 other people in next 12 hours or they will be killed and treated as one of the wrongdoers to the murdered girl, some girls delete the mail and thus have to face gruesome truth