In a Class of Her Own Episode 16

Le Xuan struggles with getting Wen Xi expelled or having his true identity exposed at the academy. Han Zhizeng puts pressure on him and allows Le Xuan 10 days to get Wen Xi expelled. Meanwhile, to get some private time at night for bathing, Wen Xi pretends to be a ghost haunting the academy. However, this nearly backfires when the students almost catch her during a night patrol. (Source: frankly at kisskh)