Time and Space Realm

The places we live in are all in a parallel time and space. Each time and space is very different, but it has the same manager. To be precise, it is an organization. Let's see how she travels through other worlds, completes arduous tasks one after another, and resolves the final conspiracy. She was calm and cold in dealing with things, but when she met him, he... After traveling through time and space many times, can she still retain her original intention? Did she leave her heart behind in that time and space, and to whom did she give her heart?