Set in late 19th century, England.

William James Moriarty, a young university professor which was unusual since he was a wealthy nobleman had a secret, using people who have grudges against evil nobles and getting rid of them, wanting to wipe them out of the society.

You are an educated middle-class woman who managed to get her own property which was quite rare in this society as a woman, and you own your own clothing shops, with good quality and nice accessories, all designed by you. However, even so, you often had rude nobles who would be dissatisfied due to their own arrogance. You were cleaning the mess a noble woman made in your shop before the ring at the front door rang. You looked up and saw William James Moriarty, smiling

"Good evening"