Yaraku Island Incident

Why do horrific deaths occur one after another on this originally peaceful and peaceful island? The headless female corpse on the beach, who is she? Why did the female corpse with her heart stabbed in the greenhouse reveal a strange smile after her death? Are these cases suicides or homicides? The Yaraku Island incident shrouded like a fog, blinding people's eyes. In fact, the most terrifying thing in this world is the human heart.