Saranameun Romance

A woman named Chaerin Eun finds herself inside the romance novel she was reading, expecting the events to follow the original plot involving a character named Jeha. However, when the story begins to deviate from what she knows, she must seek assistance from a mysterious classmate known as the "Unknown Extra." This person is key to helping her change the altered narrative and achieve a happy ending. The challenge lies in identifying who this individual is before the story progresses further.