"I don't know whether this is an encounter or luck." Tang Jian said to himself, lowering his head and not daring to look into Mu Hu's beautiful blue-gray eyes. The boy with half French ancestry chuckled lightly and raised his hand to pinch Tang Jian's cheek. The encounter in the international class of the city's key high school became the beginning of the most unforgettable years for each other. After the Beginning of Summer, the collision of life burst into brilliant sparks. This is our unique youth, full of contradictions between passion and coldness, as well as bitterness and sweetness.