An ordinary day in an ordinary campus, a girl who was loved by everyone killed herself. Everyone is asking why, but no one knows the truth, except these three: a good student, a bad student, and a weird student. For they know the truth of this incident, they decide to do something unordinary for her, as a revenge. They are the partners in crime. However, with the discovery of the girl’s secret diary, we are about to journey back to our high school lives. As an old saying goes, “High school never ends!”

Xiang Wei-xin, a 17-year-old high school sophomore, regards eating as the most important and most healing thing in life. The first time she met her senior Tao You-quan was in the school's welfare agency. At that time, Xiang Wei-xin lost 5 yuan and could not buy her favorite pineapple bread. Tao You-quan made up the money for her, which made her feel deeply indebted to her.