Xu Yan, the only student admitted through a special recommendation to Modu University, is mistakenly assigned to a faculty apartment. He accidentally barges into the dorm room of associate professor Shen Li, becoming the chatty younger brother known as a gaming buddy to Sister Li online, while they are teacher and student offline, neither knowing the other's identity. Xu Yan wins the university's mathematics competition but is instead falsely accused of having a teacher-student romance. Amid the ensuing turmoil, both identities are exposed. Xu Yan turns out to be the eldest young master of the Xu Group, and the rumors are immediately dispelled. Their mutual feelings are only just beginning.