She is his sister's best friend, and he is her best friend's brother. Because of his sister, her best friend, they "lived together". But life will never be so simple, and their lives will undergo earth-shaking changes... It turns out that she is not "she"
Everyone is a semicircle. In the journey of life, he will always pass by countless semicircles. Whether he is suitable or not, there is only one semicircle connected on the same line to form a complete circle. If it weren't for that semicircle, there would eventually be regrets. Therefore, waiting may also be the truth of love.