Strike the Blood: Kieta Seisou-hen

When a sudden, mysterious fog bank engulfs the idyllic island of Itogami, the world's most powerful vampire, Kojou Akatsuki, finds himself in an unprecedented predicament. Not only has the entire island been isolated from the outside world, but all of his friends—and even his own observer, Yukina Himeragi—have completely forgotten who he is. With no memory of his existence, they perceive him as a complete stranger, leaving the Fourth Primogenitor adrift in a sea of confusion and suspicion. As this supernatural disaster escalates, Kojou must navigate a treacherous landscape where his very identity is erased. He'll need to piece together the truth behind the amnesia while battling new threats that emerge from the swirling mist. Can he restore his friends' memories and uncover the source of this bizarre phenomenon before Itogami Island is lost forever? The fate of the world’s most powerful vampire, and those he cares for, hangs in the balance.

✦ AI-drafted summary