Sandys is a continent in the world of swords and magic.Mark, a young man living in a village in the countryside, lives a peaceful life, doting on his younger sister Milady and devoting himself to his blacksmith work. One day, Mark spots a suspicious figure following Milady.The man who was captured to prevent him from harming his sister is a railway geek who calls himself "Tetsu"...!? A fantasy comedy with a new sense of wisdom and “railway love” that opens up another world!!