Set in a steampunk inspired city, two young adults- known as Meriya and X O-Blade- strive to help the poor and helpless among the slums of the city. Though in a turn of events, Meriya is confronted with a task in which she must reconsider her ideals and provide help to a girl of royal blood, whom she despises.

After her fathers death, Aarya gives it her best to help her mother treat her ill brother Aryon. She has always felt a connection to nature, especially to the forest spirit Moriwa. Even though everyone tries to convince her that Moriwa is just a made-up story by her neighbour Pato, she resists to believe them. Feeling like the people are judging her because of her being a girl without proper manners, Aarya goes out on her own to help her brother until...