The tough and gentle Jiang Mu was originally an ordinary high school student. In addition to going to school every day, he had various "part-time jobs" to kill the rest of his time. Despite this, he was still full of expectations for life. When he thought that he would follow his mother's last wish and live a positive life, his destiny changed when he was 17 years old... "The new classmate who transferred here seems to be unusual for Jiang Mu..." The mysterious and cold classmate Xia Yinhe is only interested in Jiang Mu! Cold and lonely girl x warm little sun boy