Hidden marriage but open love

Ning xi, a girl with mysterious background and with no information about her family or friends once saved a cute little jade carved bun and father of little bun ( big bun) started pestering her to marry him.
Ning xi started living with little bun, took care, gave warmth and hapiness to little bun as well as big bun. 
Let's join her story and know about her past, present and future with little bun as well as big bun