Perfect and Casual Episode 1

Zhang Si Nian, a genius Statistics Professor, crosses paths with a naive- amiable student named Yun Shu. Zhang analyses things with a lot of mathematical precision, but his firmness often causes problems for others. One of the people to suffer from his strict accuracy is Shu. She is unable to get her graduation certificate, leading to her losing her job... But, despite everything, her happiness still remains because of a newly purchased house... However, it later turns out to be Prof. Zhang's house! Will they cohabitate? Was there a different reason as well for the Prof. not letting Shu graduate? (Source: AlopaJoyceZ at MyDramaList)