Gen's return from America brings heartfelt reunions, with the girls especially eager to welcome him back after his long absence. Yet his health shows no signs of improvement despite prior treatments, leaving him weakened amid a wave of unsettling disturbances at the school. Students begin fainting from sudden blood loss as whispers of vampires spread through the halls. Joining forces with his friend, Gen sets out to investigate the strange phenomena and restore order before the situation escalates further.