Zhang Xuan traverses into a foreign world and becomes an honorable teacher. A mysterious library appears in his mind. As long as it is something he has seen, regardless of whether it is a human or an object,...

Seo-Woo Jeong was the hottest teacher, that is, until Ih-Geon Han arrived. Tall, intelligent, and beautifully brooding, Isaac has it all and Seo-Woo knows this all too well. In the past, they had shared a su...