Yu Mang Mang, a senior student who is graduating soon still doesn't have a boyfriend. That is because she's surrounded by rumors ever since she was in high school and it caused her to have no friend at all when she entered the university.
Yet on the day of her intern interview, she meets the campus king, Lin You. The scary part is... that Campus King is going to live in her house?! Under the same roof, he starts to show his "devil" side...