He made a promise after graduating from high school. He hadn't been in love for four years. She took the imperial sister route and fell in love with someone else. He was devastated. She broke up and he got a beautiful girlfriend. She was dejected and indulged in group chats all day long. She never knew about his love for him. He was about to confess his love to her, but her childhood friend came back to China to interfere. Where should the tangled love of post-youth go?