What a beautiful word, "the past." During the best years of most people's lives, slander, ridicule, treatment, electric shocks... Cheng Feigu's youth was occupied by these nightmarish experiences. Back then, he stubbornly held on for the sake of a promise, in a way that now seemed ridiculous. Years later, when he saw him again, he finally understood just how little all that suffering had been worth. The love story between a famous screenwriter and a PE teacher, from age sixteen to twenty-six. One spent two years making himself give up. The other spent two years searching, never stopping. It turned out he had never abandoned him. It was just that he no longer knew where his own heart was. "Ning Keqi, you took up every golden year of my life, yet you always poured a bucket of aqua regia over me at exactly the right moment."