Sankaku Mado no Sotogawa wa Yoru  

The Night Beyond the Tricornered Window, さんかく窓の外側は夜, คู่หูสามเหลี่ยมล่าปีศาจ

Kousuke Mikado has been able to see spirits since childhood. He's afraid of them so he wears glasses to hide his ability. At a bookstore, Rihito Hiyakawa, an eccentric medium, notices him and believes they were meant to meet. Through Hiyakawas antics, Mikado is introduced to the paranormal world. Hiyakawa promises that Mikado will overcome his fear if he stays with him. As they work together, they discover a series of curses targeting Erika Hiura. They want to know what her goal is and how she connects with them.