When Xiao Sihan first entered university, he was full of unknown yearning and confusion about love, friendship, dreams, etc. Tomorrow is unknown, and yesterday is nowhere to be seen. He can only live in the present and keep struggling. The appearance and disappearance of Tang Shiyi, Yan Ziyan, Chen Lianghan and others made Xiao Sihan deeply understand: they are all passers-by in life, and they are still alone in their own world. The young man in the blooming season has endless reveries about everything, burying the singing years in laughter and tears...