Zhang Si Nian (Wei Zhe Ming), statistics professor, was considered to be perfect in every way and pursued perfection in every thing in his life. Then one day his world is filled with chaos when a statistics student, enrolls in one of his classes.
Yun Shu (Xu Ruo Han) is optimistic and a bit simple girl doesn't like t cause any problems. She quickly finds herself homeless when her cousin cheats her out of a large sum of money. Fate will have it any other way than to reunite Yun Shu and Si Nian who makes her an offer she can't refuse.
In comes the ailling grandfather that wants to his grandson settled and married before he dies. Si Nian sees Yun Shu and offers in exchange for pretending to be his girlfriend a place to live
Agreeing to a loveless contractual marriage they end up in a place neither of them would have expected. With time feelings naturally grow between them. Luckily they have the support of their close friends and family to help them. Of course no Romantic Drama would not be wort watching without the help of the ever "perfect" jealous shrew.