- **Time setting**: Fall of 2023, the eve of the 70th anniversary cultural festival of Ivy High School
- **Location Setting**: In the coastal city of Lukang, the century-old main building of Ivy League High School and the newly built Glass Art Museum form a time-space collision.
- **Basic background**: Five high school students met because of the cultural festival executive committee. During the preparation process, they discovered the school's dusty tradition of "red maple letter paper" and uncovered the youth secrets of three generations.
Intent: a token that lasts through three generations