Qiao Nai, who has just entered college, accidentally meets the idol of her best friend Cao Wen, star senior Bai Yi. Although Bai Yi is humorous and talented, Qiao Nai only felt very comfortable getting along with him, until she accidentally fell into the water and traveled back seven years to meet the 20-year-old Bai Yi...
God, how come my senior is so good-looking!
Concept: Is there a time you want to go back to? Friendship, love and the trivial matters of youth, to commemorate the time we can never get back.