In the late autumn of Jiangnan, in the classroom without air conditioning, the books were so cold that they were silent. The world of academic masters is not something that creatures like Lin Jian can break into casually. But, absolutely, it was the top student who touched her world. The warmth of his fingertips still remained on the cold mathematics book, making the nightmare-like numbers, graphics and symbols on it as refreshing and active as beer foam, as bright and comfortable as spring flowers. The fall of a girl's heart comes so suddenly and simply.