Life is like an inextricable knot. When they were young, they were in it but didn't realize it. When I look back as a teenager, I realize that those knots that could not be untied at the beginning have already formed an inextricable bond between them.
Concept: They are obviously always smiling and enthusiastic young people, but when they get close to each other, they find that each of them has scars that they carefully guard.