Lin Yan, a guaranteed admission freshman in the Economics Department of Modu University, arrives late and is mistakenly assigned to the faculty dormitory building. He accidentally intrudes into the dormitory of Su Li, the beautiful associate professor of the Mathematics Department across the hall, and walks in on her post-shower scene, thus starting a fateful entanglement. In reality, they are a cold royal sister teacher and a glib genius student, but in the game, they are taciturn and scheming gaming partners 'Buli' and 'Xiaohualao', running dual identities without knowing each other's true selves.