My Favorite Savior Girl summary:

As Lee Yeo-ju hums a song that comforted her during her long hospital stay, she is approached by an idol star named Park Jea-ha, whom she has only seen in videos. "I'll help you. You need money for the surgery, right?" Jea-ha become Yeo-ju's savior and favorite. However, five years later, he ends his life by making an extreme choice... Yeo-ju, in shock, cries out to a shooting star to save him. Did her wish come true? She goes back seven years and possesses the body of Jang Bo-ran, a top idol at the time and a judge on the audition program "I Am the Strongest Idol"... Among the audition participants is trainee Park Jea-ha! "Just like you saved me, I will save you this time."