19 parts Complete Yeji has a long time Girlfriend, her name is Ryujin. After their celebration on their 4th Anniversary, Yeji suddenly got into a car accident and she died.
When she opened her eyes, Yeji's still on earth and she met the Heaven's Guard. She has a mission to save Ryujin because she is planning to end her life.
In order to help Ryujin, she needs to set someone to help Ryujin cope up with her loss and Yeji witnessed how Ryujin fall in love with someone and that someone is her Bestfriend;
That is when she died TWICE.