Gen returns from America to a heartfelt welcome from those who had missed him deeply, yet his ongoing illness shows no signs of relief despite prior care. As he readjusts to school routines, a wave of unsettling incidents begins, with students collapsing from sudden blood loss and whispers of vampires spreading through the halls. Joining forces with his loyal friend, Gen sets out to unravel the source of these eerie disturbances before they escalate further.