everything has changed

3 years passed. well, it took a long time to get over what happened ( jin yi is now 18 years old and ha joon is 16 years old). jin yi has been strictly forbidden to like or love any guy because she needs to focus on her studies. she has been obedient and has always kept good grades, so as ha joon. so hyun, has always been jin yi's best friend. unknown to jin yi, so hyun has always been jealous of her. jin yi fell for so hyun's trick. but one day, this jealousy turned into hatred. jin yi, is a trusted girl in her department and she holds the key to the laboratory but trouble soon came.