Shen Fuming has been in love with Xu Nan for 3 years and has been secretly in love with Xu Nan for 7 years.
In Shen Fu's heart, Xu Nan seemed to have overcome the seven-year itch with him;
In Xu Nan's mind, Shen Fu was just the science guru in her high school class and her ex-boyfriend who was once her best friend.
Purpose: To live hard in this difficult world