Please answer, my youth. After evening repairs, we must walk on the playground with the people closest to us, the beautiful sky blue cuso4 crystals in the chemistry experiment, the girl's suddenly relieved eyebrows after crying, the white sneakers soaked by the rain on a rainy day, the new cuisine in the canteen and the increased price of potato chips in the canteen, adults testing our dreams. Youth is long and confusing, which is the most profound understanding of the girl Lingyu. But it doesn't matter if it's painful or confusing. We are only 16 years old. Because it was inspired by the Reply series, there will be a husband-guessing plot and a lot of intentional or unintentional foreshadowing.