If There Is No Male Lead, My Grades Will Fall

'''[College is at stake, the goal is the male lead's perfect attendance!] "It's amazing that I've regressed, but to think I've possessed an extra in a shoujo manga?!" Han Ji-seo, a K-high school student, has found herself possessed by an extra who is perpetually second place in a shoujo manga? No matter what she does, she's always the second in the entire school, and on top of that, she's just an insignificant extra... What a total stroke of luck! Thanks to this, Ji-seo was spending her days without a care in the world about studying. But suddenly, she ends up at the bottom of the class in a pop quiz. What was different this time was the absence of the male lead, Joo Yi-won, who is the...