There are many incredible things in this world, just like Yun Sijia never thought that she would really go back to her teenage years.
She has been committed to the research of parallel time and space, but does not have any hope for time travel.
She knows the difference between ideal and reality, and she becomes less emotional and romantic.
But is now a chance to start over?
Can she save her "friends", regain her dreams, and maybe have a wonderful encounter with her high school boyfriend?
But when fifteen-year-old Yun Sijia greeted her, she felt something was wrong.
Intention: Life is like an adverse journey, and I am also a traveler.