Shin Yena, cousin of the 17 year old girl named Shin Yuna and the 19 year old girl named Shin Ryujin. Shin Yena, 17, turning 18 2 days after Yuna's 17th birthday and make a big birthday party. Yena is a bad girl, making alot of trouble in school, teasing the teachers till she got suspended for this one subject and then go back to school. She dont have any friends, because she likes to be alone, but what if the popular girl, Choi Jisu, or how people call her, Lia, slowly come into her life because her cousin is friends with her. Will Shin Yena fall inlove with Choi Jisu and Jisu change her, or will Yena just hurt her and keep everything cool. (G!P Lia) x fem reader