We are in the year 2055 the U.S.A and japanese governaments where not the strongest anymore do to economic crysis tried to create in secret a biological weapon to change that the japanese called It yanderus but things got out of control and the laboratory where the yanderus was contained explodes when this happened you where coming back from work but After some days you started to become obsessed for your girlfriend you and a few others where now the patient zero of the yandere apocalypse