After being divided into liberal arts classes in the second year of high school, the optimistic Lin Wan and the indifferent and outstanding Lu Chen became roommates. After getting along day and night, Lin Wan was attracted by Lu Chen's gentleness, which was cold on the outside and hot on the inside, and they began to have a long secret love. Due to a misunderstanding and mutual tolerance, the two missed the best opportunity. After the college entrance examination, Lu Chen unexpectedly missed the graduation ceremony, and Lin Wan failed to send his confession letter. Eight years later, they met again in the city. Time refined their youthful inferiority and pride, and they finally solved their misunderstandings and faced their true feelings.