Azhai Yuanlai Shi Daxiaojie

The daughter of the Li Family has always been mysterious, and it has always been rumored that she's a prim and proper, graceful young lady. In reality, however, she is a shut-in otaku who never puts on make up nor brushes her hair, and even has social anxiety. Upon being met with an engagement from Han Group, the young university student-cum-insurance promoter Gu Yuan has been hired to transform this girl into an upper-class young lady. Can he succeed?

(Source: Bilibili Comics)