Seikoujo: Haitoku no Biden Dorei

Sister Rosaria is working in the village's local church. All items have been peaceful and a lot of times of happiness have passed. 1 day a brand new priest and a sister arrive... and her happiness is suddenly shattered. The 2 are imposters, villains out and about for theft and murder. However that isn't the only issue... the person is a former priest who sexually assaulted sister Rosaria often previously. Now, the village's peace is her hands if she doesn't obey "Father Edwards", she has sworn to kill each one of the villagers...