en CB01 OFFICIAL. A Professor talks by phone video conversation to his girlfriend to invite her to his house, but interrupts the conversation to give an online class. As each of the students joins the class, they become ill and violent. Some students who had not started class, because they had not been able to get home, are communicating to notify that unexpected circumstances to the Professor, but are attacked, the Professor tries to calm down and calm his last student, but there is an outcome.