This is the story of a young girl who fell in love with a boy in her ignorant years, but the two could not get together. The other boy who had been waiting by her side did not get together in the end. Ten years later, the two met again. He told her the reason why he left that year. She would rather not know the reason, so that even if she hates him all her life, it is a kind of happiness. Now there is no happiness, and all she gets is an answer she doesn't want. In fact, none of us have ever lived up to it.