Ah, Ren-chan's type is clear.
The Duke of Death had a similar premise, so I shouldn't be surprised, but the plot actually mattering in a romcom-type manga does feel odd. It's great: we feel a push-pull too. We want to know why the other girl was killed, we want to understand who the shogun is and what they want and why anything happened, but we also root for the two to get together. It's a different dynamic than Duke, where we wanted to understand and solve the curse so the two could get together, but the plot actually mattering is still there.