Lin Guanqi and Jiang Mianqin of Sounan University are rival enemies on campus, harboring grudges due to an opening-day mishap and frequently bickering year-round. Unbeknownst to anyone, the two are actually anonymous lovers who have been in an online relationship for four years with soul-matching resonance. On the eve of meeting in person, Lin Guanqi unexpectedly discovers that the aloof campus belle is none other than Mianmian, his soft, clingy online-dating girlfriend, leaving him startled and bewildered. Jiang Mianqin subsequently sees through the other's identity as well, hiding her own thoughts. Unraveling past misunderstandings, the two rush to an offline date carrying a two-way secret, kicking off a campus sweet romance full of stark contrasts.