Yoon Kyungsu, who is the newest addition to South Korea's National Climbing Team, thought her mother wasn't that serious about her boyfriend. But after finding out that they plan to get married after one year of seeing each other, the 18-year-old has a hard time accepting it. She then meets her five step-brothers: Yeonjun, the eldest who acts sweet at first but keeps to himself, Soobin, the gentle and reliable one, Beomgyu, is the same age as Kyungsu who is known for his flirty attitude, Taehyun, the cold but smartest from the brothers, and lastly Kai, the youngest who may look mature but isn't. Everything looked so picture perfect like it came out of a movie, but after the wedding, when her mother and step-father left for their honeymoon, that was when she noticed that not everything is "happily ever after" in reality. Kyungsu tried her best to get to know her new siblings but every time she does, they end up slamming their bedroom doors in her face. Forced to seclusion, Kyungsu gives herself a tour of the big mansion by herself but her curious wandering almost brought her to her death if one of the boys hadn't stopped her. "DON'T EVER STEP FOOT IN THE WEST WING AGAIN!" He yelled at me while pulling me back to the main stairs. His tight grip on my arm was starting to hurt me but this was the first time I was seeing him worried. Did I do something wrong? What's so special about the West Wing? Then he lets go of my arm and asked, "Do you hear me, Kyungsu?" I shivered under his gaze and voice but nodded my head with a quick answer. "Yes... I heard you." Then he took a deep breath in and calmed down. "Promise me you won't go back there," He said, his eyebrows crossed together. "I..." I looked back down the dark hallway that leads to the West Wing before looking back at my step-brother, "I promise." But knowing my stupid curiosity... I probably would come back to that room. TXT AU WRITTEN BY LCVERYU started: 04/10/2023 ended: tba