My memory will forever remain in the year I took the college entrance exams." In the May of 2016, a high school senior at a small town's prestigious high school fell to her death and was ruled a suicide. Two years later, senior Yinzhe was welcomed into a new classroom on the top floor. Due to his unsatisfactory science grades in his junior year, he was forced to join the literature class. As the workload for supplemental courses slowly overwhelmed him, "hallucinations" started to occur... An unescapable nightmare-like high school life... Yet as now he looks back, he suddenly realized he could no longer feel the flow of time after the college entrance exams.