エデンズリッター 第1章外伝 淫難の巫女姫セシリィ編

Half a year after the lustfiend invasion initiated by the traitor Archbishop Rudolf—
The Elleraldian throne is Cecily's, and to her too fall two heavy burdens: she must rebuild the nation into prosperity while fending off the ever-growing lustfiend threat.

Through countless lewd and diabolical trials, Cecily has grown into a strong woman worthy of her reputation as a saint.

Her strength will soon be tested, though, as an ominous shadow encroaches on her holy kingdom. Foul undead trample the sacred soil, tracking gravedirt into the cathedrals that are the strongholds of Ellerald's uniting faith. Meanwhile, along the northern border with the militaristic empire of Galveria, hitherto unknown monsters wreak havoc on the land. And around Cecily a rising darkness coils, lurking in plain sight, awaiting the moment to ensnare the royal priestess-knight and once more subject her to torments anew...

[From Steam]