Emiliana: Holy Lady's Demonic Covenant v.1.06.5

A young girl named Emiliana looking fine with her blond hair
lives modestly as a nun in a remote village, Zamak.

One day, a soldier comes from the central city, Marysass, and
abducts Laula, who is Emiliana's little sister, in the name of the witch-hunt.

To save Laula, Emiliana devotes her virginity to Beherit, a demon,
and attains power to fight in return, becoming a "witch".

Having lost her humane qualities, Emiliana will be instilled with,
still yet keeping her devout and saint-like mindset in mind, sexual
pleasures given by men and monsters on her adventure in search of Laula.