Chen Xinran has liked a boy for three years. During these three years, she has been struggling in the whirlpool of longing every day. She bet her entire youth for Shen Huanyu, but in exchange for a sentence of "Who are you, do we know each other?" The cold words caught up with all of Chen Xinran's youth, and made all her thoughts in the past three years turn into a river of stagnant water, exuding a disgusting stench, but she still can't forget him, because this person makes Chen Xinran's youth shine in the long river of time.