Decadent Sister

A church that trains sisters introduces a "sex education class," and that's the crack in the wall before the whole place comes down. The protagonist shows up for worship and gets pulled straight into whatever this revolution turns out to be.

The setup treats the church as a system to be undone from the inside, with the protagonist as the accidental catalyst rather than the architect. From there, the story tracks how that first class snowballs into something bigger, sister by sister.

Progress runs through turn-based encounters layered over the visual novel scenes, so choices and strategy feed directly into how each relationship plays out, with multiple endings depending on the path taken. The cast leans into female domination and femdom-adjacent dynamics, with a futa/trans angle folded into the mix rather than treated as a side note.