In September, when the cicadas began to sing, sixteen-year-old Su Nian clutched her schoolbag strap and fell into the classroom. The golden sunlight danced on her timid eyelashes. When Gu Yan burst into sight with sweat from the basketball court and a smile as hot as midsummer, the gears of fate crushed the girl's calm heartbeat. The young man's fingertips traced her hot draft paper, hiding his throbbing in the quadratic function curve, and confessing his sincerity under the spotlight of the art performance. But youthful love is like gardenia in the morning mist, which cannot withstand the scorching sun. When rumors and misunderstandings arise like thorns, the two shadows finally get separated at the crossroads of the college entrance examination. After many years of reunion on Wutong Road, the warmth from Lin Yu's palm intertwined with the unquenched spark in Gu Yan's eyes. Su Nian touched the gilded name on the wedding invitation and finally understood the shadow of the trees outside the classroom window that year - some flowers bloom just to teach you how to wait for the spring breeze, but the midsummer that truly belongs to her is quietly growing in the unfinished ending between the pages of the book.