1. Missing Brother
Having recently arrived in the city, MC is getting to know the place and ends up meeting YC. Things are casual at first, but it soon becomes clear that MC is searching for someone. His brother got involved with some gang and went missing, so MC is determined to figure out what happened. It turns out that YC knows more about the disappearance than she lets on, possibly having ties to the gang. They could work together to get the answers they need.
This plot is very open and could even be played in a fantasy or medical setting, as well as real life.

2. Special ops.
Our characters work for a secret organisation, and their job is to handle any difficult situations that arise with rivals. They would be assassins basically. They would be on one particular job together, but each would have been given the order to kill the other once the job is complete. They would both survive and realise they have to fight back against the company. Go into hiding, find out who wanted them dead, and finally find their freedom.
Again this plot is very open to suggestions, and we could figure out exactly where we want the story to go.

3. Debt Riddled
MC would be a wealthy businessman and YC would work for him. Due to some circumstances YC ends up in massive debt and MC ends up blackmailing her in order to for her to keep her job.
I could play another character who would come to understand what was going on and intervene, giving her a way out from the blackmail, or we could stick with the two characters and see how their relationship would develop.

More to come!

I’m also open to coming up with ideas on the spot. If you have a particular theme or plot in mind then let me know and we’ll figure something out!