**Chapter 1: An Invitation to Chaos**

I stared at the sleek black invitation in my hands, a mixture of curiosity and excitement brewing in my chest. The text was simple, yet intriguing: "Come spend a week of fun, food, and games with us at our rented mansion! - TXT". I had received it a few days ago, and I couldn't help but feel a sense of anticipation. Who wouldn't want to spend a week of leisure with friends, away from the pressures of promotions and schedules? I walked into the living room, where my members were lounging on the couch, and tossed the invitation onto the coffee table. "Hey guys, look at this!" I said, grinning. Bang Chan's eyes lit up as he picked up the invitation. "TXT's inviting us to a week-long hangout at their mansion? That sounds like a blast!" He looked up at me, a mischievous glint in his eye. "We should totally go." Lee Know chuckled. "I'm in. Who doesn't love a good party?" The rest of the members nodded in agreement, and I quickly pulled out my phone to text TXT. A few minutes later, I received a response: "Yessss! Can't wait to see you guys here! - Soobin". The next day, we arrived at the mansion, a grand estate that seemed to sprawl on forever. As we stepped out of the car, I couldn't help but feel a shiver run down my spine. There was something about this place that felt...different. As we entered the mansion, we were greeted by the members of TXT: Soobin, Yeonjun, Beomgyu, Taehyun, and Hueningkai. They showed us to our rooms and invited us to join them for dinner. As we sat down at the table, I noticed that Enhypen had also arrived, and we spent the evening chatting and laughing together. I was having a great time, but I couldn't shake off the feeling that something was off. It wasn't until we were all settled in for the night that I started to feel it - a strange, tingling sensation in my veins. I tried to brush it off as fatigue, but as I glanced around the room, I caught a glimpse of myself in a mirror. For a split second, my reflection seemed...off. I pushed the thought aside, telling myself I was just being paranoid. But as I looked around at my members, I couldn't help but wonder if they were feeling it too. Little did I know, this week was about to get a lot more interesting. As I stood up to get a drink from the bar, I caught Felix's eye across the room. He looked...different. His eyes seemed to gleam in the dim light, and for a moment, I thought I saw something flicker in his gaze. Something that didn't quite look human. I shook my head, chuckling to myself. I was just seeing things. But as I turned back to my drink, I couldn't shake off the feeling that this week was going to bring out secrets I never knew existed.