On the campus of Beijing University, the poor and optimistic Ruan Zhixia signs a dating contract with the indifferent campus hunk He Xizhou to earn living expenses, becoming his "contract girlfriend." From pretending to be a couple to treating each other sincerely, they face rumors and obstructions together, and also leave warm memories in Ruantai Village. He Xizhou finally confesses his feelings, and Ruan Zhixia responds bravely. Moving from a contract to true feelings, the two write a pure and passionate youth love song in the spring campus.