[While You Were Sleeping] Fanfiction tells the love story of Yeon Hee-hyun, a future scientist who accidentally came to the 21st century due to an experiment, and Han Woo-joo, a former experiment subject and policeman who has been a friend for ten years. - - - - - - - - -She once completed his defective chromosome and witnessed countless proud moments in his life. Regardless of whether he disappears or not, Yan Xixian is always the only bright color in Han Yuzhuo's eyes. He never thought of giving up Yan Xixian, and Yan Xixian finally came back. Probably the best thing in the world. - - - - - - - - - Well, this is a silly author who is very serious in his writing. This article is easy to write. Anyway, it is easier to write than Sherlock next door.