Love is human's biological instinct, how to love is very important. Everyone expresses love differently, and wrong expressions will only be counterproductive. Looking back at the past, in those days when we were young and frivolous, we kept learning how to love while stumbling and stumbling. Did we leave any regrets in our youth? If you could go back in time and choose again, would the ending be the same? As childhood sweethearts, they slowly learn to love as they grow up, and where will misunderstandings push them?