The Brother I Swore Brotherhood With Is Actually the Demon Emperor Wanted Across the Heavens

Lu Yan transmigrates into a book as a short-lived cannon-fodder character. With a powerful family, a network of connections, and a plot System at his disposal, he originally plans to cling to the fated male lead and keep his head down to survive.

But the plot veers completely off course: Su Jingheng, who was supposed to be lonely, opens his heart to the unremarkable follower A-He; and the saintess, who was meant to become his fated partner, already has someone else in her heart.

He rescues a cold and aloof person who is gravely injured. The person refuses to reveal their real name, takes the name Shen Yanzhou, and becomes sworn brothers with him.

Lu Yan does everything he can to care for him, only finding the man's behavior strange at every turn. He avoids the people of the immortal sect and won't let anyone examine his injuries.

It takes Lu Yan a long time to realize that the brother by his side day and night is actually named Su Wanning, the Demon Emperor hunted by the entire immortal realm.