The Night Beyond the Tricornered Window (manga)

The Night Beyond the Tricornered Window (Sankaku Mado no Sotogawa wa Yoru, さんかく窓の外側は夜) is a Japanese Yaoi manga series by Tomoko Yamashita. It has been serialized in Japan since April 2013 in Magazine Be x Boy by Libre Publishing with SuBLime releasing in English since March 24, 2015. There are currently eight volumes in Japanese, with six volumes in English.

Synopsis
Shy bookstore clerk Kosuke Mikado has the ability to see ghosts and spirits, an ability he wishes he didn’t have, since what he sees usually terrifies him. Rihito Hiyakawa, an exorcist whose supernatural powers are as strong as his social graces are weak, doesn’t seem to fear anything, mortal or otherwise. When this odd couple gets together to solve the bizarre cases that come their way, their work methods may not be entirely safe for work!