- Protagonists: Lin Wan (a delicate and sensitive girl who loves painting), Chen Yu (a cheerful and tenacious boy who dreams of becoming a doctor)
- Core image: the "time jar" under the old locust tree (buried by the two in childhood, containing drawing paper, marbles and other tokens, which is a symbol of emotional bond)
- Story span: 18 years (from childhood sweethearts at the age of 6 to finally getting married at the age of 24)
