退魔士と魔法少女(5)～愚者の悪霊と囚われた少女～

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...