Oblation

Oblation is a linear dark fantasy VN set in a fantasy world inspired by 18th-century France.

A young nobleman, Leon, determined with saving the humanity of the people around him, and a knight, Alexander, sworn to protect him. A large religious movement threatens the country, it is unknown for what reason they are converting others to their faith, but Leon will not stand for it. Will they have the power and determination it takes to save their world bereft of saviors?

[From Itch.io]