The Night Beyond the Tricornered Window - S01

Kousuke Mikado has seen spirits his whole life, but they terrify him so much that he tries to block them out by wearing special glasses. While working at a bookstore, he draws the attention of Rihito Hiyakawa, a quirky medium who insists their meeting was fate. Hiyakawa drags Mikado into the supernatural world, promising to help him overcome his fear if he sticks around. As the two work together, they uncover a trail of sinister curses tied to the name "Erika Hiura." Who is she, and what does she want with Mikado and Hiyakawa?