After entering college, Gu Youzhi thought he would live a peaceful life, but he met different roommates, Beichen, Xia Xi, and Ye Yan. He originally thought that it would be okay, but he didn't know when he started to care about Beichen's every move. However, Beichen had a venomous face and a sharp tongue. During the period when Gu Youzhi silently liked him and in the days when he spent time with him, he finally understood what the so-called self-inflicted evil is.