The whole school knew that Professor Gu from the Department of Mathematics was aloof and ascetic, but he had a little girl in the palm of his hand. He gave her lectures every night, and his shirt was meticulously buttoned, not even showing his wrists. Until the school anniversary dinner, someone saw the little girl tugging on his tie and saying coquettishly: "Brother, you really can't do this question." Professor Gu knelt down on one knee and held the tip of her high heels: "Then I will teach you slowly when you go home." In the dim light, he whispered in his ear: "Teach me until you can... My little rabbit."