The sin of all this stems from the fact that Jiang Zixi once said that he would like Lin Zhiqing and vowed to her that he would marry her when he grew up. But it didn't take long, ever since Jiang Zixi met Lin Shuya, his heart began to sympathize with Lin Shuya (due to heart disease) and turn to like Lin Shuya. Lin Zhiqing framed Lin Shuya many times, but in the end, it still couldn't change the distance between Jiang Zixi and Lin Shuya.
Intention: If the end of the world comes, perhaps love is necessary to change people's direction.