Youth is like shells scattered on the ground. Yiyi is picking up the shells carrying memories along the coast. Some are beautiful and some are ugly, some are complete and some are incomplete. The friendship of youth carries the atmosphere of the world, and the love of youth is so pure and heart-wrenching that it may be sweet or sour. These are the moments of youth that we cannot get back. Because they cannot be copied, they are precious. Even if we look back and see spots all over our eyes, we still can't help but reminisce and reminisce...