I am witnessing a scene between the villainess and the heroine, and I'm in my rebellious phase.

Even Noble Young Ladies Have Their Rebellious Phase! And thus, she unconsciously crashes the scenario. (Since I was asked various things in the comments, I added detailed settings to the afterword, but it became too long and felt like overkill, so I ended up deleting it. Since this was written quickly, please feel free to fill in the gaps with your imagination regarding the background characters who have become invisible in the story, and I hope you can enjoy the work on its own.) (I am also posting this on Alphapolis and Kakuyomu. Posted as required by Naro's regulations)