I Was Reincarnated as the Villain Who Confines the Heroine in an Eroge World, But for Some Reason I’m the One Getting Confined by the Heroine Instead

I just wanted to escape from the heroine. I didn’t want to become the strongest or anything

I reincarnated as the villain who confines the heroine. In the original story, I was nothing more than a disposable minor villain who locks up the heroine and then gets crushed by the protagonist. In other words, if things continued like this, I was on a straight path to a bad ending. Of course I planned to avoid that future. But what if this world has some kind of narrative compulsion, and no matter what I want, I end up confining the heroine anyway… The only destination would be ruin. So I made a certain resolution. “All right! I’ll train so hard that I’m ready for what comes even after the confinement!” I’d grind until the protagonist could never beat me, lock the heroine up exactly like in the original story, then immediately flee the country. That was supposed to be my perfect plan. And yet… “—You were the one who saved me when I had fallen into complete despair.” “—You were the one who dragged me out of the room where I had shut myself away.” Before I knew it, I was the one being confined by the heroine. “Isn’t confining people supposed to be my job? Why am I the one locked up instead?” “Because… if there’s even a chance I might lose you, it’s better to keep you locked away.” “That’s my line.” This is the story of a man who trained desperately to avoid a bad ending and became the strongest, and a duke’s daughter who schemes with everything she has to monopolize that man completely.