Whose youth does not end in tragedy? The synonym of youth is regret. In the year of repeating his studies, Gu Teng met Bai Yanxue, that gentle and lovely girl who looked like a little fairy. In this most beautiful age, the two people's shadows are intertwined. Like other lovers, they do homework together, watch movies together, sit in a milk tea shop and drink milk tea together, and break up like other lovers.