Taimashi to Mahou Shoujo (5) ~Gusha no Akuryou to Torawareta Shoujo~

One month ago, exorcist Kaoru Okumoto was hired to investigate
the nature of a major spiritual force in his hometown and he met
his childhood friend Serika and her elder classmate Haruka.

Reuniting with Karen's mother Hasuna they help the ghost of a young
girl rest in peace but two weeks later, on the night of a new moon...

[From DLsite English]