Kim Taeyeon, SM High's most popular and prettiest student. She has good grades and good looks but Taeyeon also has a boyfriend, 'Byun Baekhyun', the school's most popular guy. He was the captain of the Soccer team with a strong muscular structure and a handsome face, captivating the hearts of all the girls in SM High. You, Jung _________, an orphan who was abandoned by your parents. You grew up in an orphange until you were 12, then you left and faced the harsh world by yourself. You didn't have the lastest clothes or iPhone or even have enough money to attend SM High. You got a scholarship and was one of the smartest people in the school, despite many disliking you. You were teased and bullied so badly, to the point where you cut and harm yourself everyday. Taeyeon was your crush since the first time you accidentally bumped into her in the library. Taeyeon's friends and Baekhyun made a bet that Taeyeon wouldn't be able to make you fall in love with her. Fooshily, she accepted it the bet. However, her feelings seem to change as she got to know you better.

Will she truely fall in love with you?...Or would you be just a bet?