I'm Waiting for You at the End of the Past

What is the biggest regret in life? Shen Qiao's answer is: he lost the "best" person for a "better" opportunity. He was once a promising photographer, with the most tacit partner beside him, and the one she promised to spend the future with. But one of his "wise" choices caused them to part ways, and their dreams and love came to nothing. After many years of separation, he turned his life into an isolated island, trapped in the cage of memories. He gained an almost cursed ability to see "echoes" of time. Day and night, he watched the summer he could never go back. Her smiles and the promises they made all replayed before his eyes like a movie. The warmer the echoes, the colder the reality. Until one day, a young girl who looked exactly like her, with the same curiosity about the world that she had back then, opened the door of his dusty little shop...