I'm Not the One Who Seduced the Dark Grand Duke

"I feel like someone else took over my body while I was out." Having inherited the marquisate at a young age, my days were spent solely on work, knowing nothing else. One day, after collapsing from overwork, I opened my eyes to find a week had passed. Yet, people told me: "Pardon? You certainly collapsed, but you woke up the very next day, didn't you?" "Of course, you did feel a bit different from usual. Almost like... you were a completely different person." Wait, what on earth are they talking about? That definitely wasn't me! I'm just waking up now, a whole week later! And to top it all off, the final blow: A letter handed to me by a maid. [Hello! The fact that you're reading this le...