The Mistress of the Magical Express

Everyone has moments when they realize – your life will never be the same. Mine came with the arrival of a small runaway on my train. Everything would be fine, except for one thing – the girl's guardian is the one who broke my heart a few years ago. And one more little nuance – the girl turned out to be a Slider, and in all worlds, there is a hunt for her. I will help them. But who will help me when the secret of my origin is revealed, and the chase begins for me?