Unfamiliar [K.T.H x Y/N]

"You better not get in the way." He is worse than a monster! I got reincarnated in the body of 'Han Aera' the Fiancé of The Ruthless Tyrant soon to be Crown prince 'Kim Taehyung' a day before their engagement. "How am I supposed to live with this cold Jerk for the rest of my life!?" Ongoing