Peace of Mind Is Happiness

Li Zhi'an had a difficult childhood that left him timid and withdrawn. After learning he had heart disease, he decided to make some changes and try to experience the joys he had never known. Perhaps it was fate that brought him, during his final year of high school, to the place that would matter most in his life: the most troublesome Class Sixteen.

Though no one believed in them, Li Zhi'an stepped up to lead the class in striving to change themselves and shed their reputation as bad students.

As they shared many happy moments, Li Zhi'an became close friends with them, and his personality changed dramatically. What is more, he met a... very important... girl...