This is an idea I have been wanting to try. Willing to do this story with either a female or male Dominant. (MC = My Character, YC = Your character)
MC comes in to work one Sat to finish project. Taking a break she surfs the internet and finds a BDSM chat room. For fun, she plays the role of a sub in one of the group chats. A few days later she starts to get emails at work from someone (YC who works in IT Dept and discovered this on system logs). At first they say that they enjoyed chatting with her. Then they ask her to do things, easy at first (wear a red dress to work, use certain shade of lipstick, etc). MC does it at first, but then stops. YC then sends her photos of her not doing as she was told, and telling her this is not a game. MC gets worried and does more tasks each one a bit more degrading or humiliating.
MC complains after awhile and YC says they will stop....if MC will agree to meet them and get tied up. MC reluctantly agrees, and asks YC (who she doesn't know is doing this to follow her, in case YC does something while she is helpless. YC asks MC before they go if MC has told anyone else. MC says no just YC. So then YC realizes they can make MC disappear to make this a permanent situation without anyone knowing. Then MC is really in trouble!