On the first day of school, Lu Chen stepped into a top university, only to find that his gentle online girlfriend "Sweetheart", whom he had been obsessed with for half a year, was actually the talented professor Su Qingxue who was known for his cold and stern attitude on the podium. When the sweetness of the virtual world shines into reality, the contrast in identity puts this taboo relationship in danger in the campus undercurrent. While having to deal with the campus turmoil and love rivals, while guarding this secret love affair that cannot be seen in the light, Lin Mo moves through sweetness and danger step by step, but he does not know that behind his seemingly ordinary life experience, there is a shocking conspiracy that can subvert the two big families of Su and Lin.
