At the autumn sports meeting of Mingde Middle School, Su Qingyan, the cold-blooded top student, hid beside the referee and waited, but was accidentally knocked down by the transfer student Jiang Yubai who lost control after crossing the line. The sound of "I fell on you" became the beginning of their fate. Since then, solving problems side by side in the library, confiding their concerns on the rooftop, and tacit cooperation during competition training have gradually brought the two hearts closer. From bicycling together in the morning light to relying on each other under the umbrella of the rainy night cinema, from preparing for the math competition together to the hot pot date after the provincial competition, Jiang Yubai's attentiveness and tenderness melted Su Qingyan's aloofness little by little; Su Qingyan's firmness and companionship also became Jiang Yubai's strength to move forward. Orange-flavored candies, bracelets engraved with each other's names, notebooks filled with encouragement, every detail contains heartfelt feelings. They supported each other on campus, ran side by side on the youth track, and wrote a sweet story about encounter, growth and staying together with warmth and love.