"Song of Yesterday" adapted from the famous The manga of the same name tells about the troubles of four adolescent boys and girls next to the subway line. They love each other but cannot tell each other's secrets. They have all kinds of worries and talk to each other, and there are also some things that can only be hidden in their hearts, and they are eager to be known by others, but they dare not reveal the slightest bit. Half of them are looking at the past, and the other half are looking at the past. Longing for the future, they were classmates in ordinary high schools, and experienced stories of laughter and tears with each other, they grew up in the stories, and in the end, these beautiful memories of growing up together will also become the last song of yesterday . This ballad is light and a little sad, because yesterday can never go back, and all of us are thinking about yesterday, and these 4 boys and girls are also immersed in the remembrance of yesterday. Fortunately, they finally stood up bravely and confessed themselves, so they were happy together