Su Mengxue, a lively film student, meets cold campus heartthrob Xiao Nan. After a bet, she gets his contact. Their frequent "accidental" encounters spark romance. Though aloof due to childhood neglect, Xiao Nan opens up under her influence. They love but separate for his future. Through hardships, Su grows from cautious to brave in love. Their youthful bond weaves laughter, tears, and warmth.