Hard to make a romantic cartoon!

Yunjae possesses the body of a character in a romantic comic.
The character he possesses is a supporting character called Doyeong, the sickly brother of the story’s heroine, Dohui.
Doyeong, a victim of bullying, meets a tragic end and eventually commits suicide.
In order to survive, Yunjae tries to change the plot of the story…
Will he be able to go back to his original world?