The Night Beyond the Tricornered Window

Kousuke Mikado has seen spirits his entire life, and they terrify him. To block them out, he wears special glasses. One day, while working at a bookstore, he attracts the attention of Rihito Hiyakawa, a strange but gifted medium who insists they were meant to meet. Hiyakawa drags Mikado into the world of the supernatural, claiming he can help him overcome his fear-if Mikado sticks by his side. As the two work together, they uncover a string of sinister curses tied to one mysterious name: "Erika Hiura." Who is she, and what does she have to do with Mikado and Hiyakawa?