I gave this a go but I could not figure out how to finish the tutorial I was stuck in there for 10 minutes at least.
The music became very grating at that point so I had to quit.
I understood the conversation simulation idea. However, I soon forgot the instructions that were delivered on screen and couldn't remember which symbol meant which stance.
I also could not figure out what the lines at the top indicated. I got the red line all the way to the right which I thought would end the conversation but it looped back to the left.
9 days ago (+1)
Hey, Jonathan. I'm sorry to hear you got stuck.
The white question mark next to the action selection menu opens the cheat sheet. And it will also trigger a symbol to be displayed in case you missed it.
The lines at the top are the queue - the blue line is the protagonist and the red line is the NPC. They loop back from the start each turn.
9 days ago (+1)
I played through the tutorial and completed it. For the final part it is enough to do basic actions to increase the mood and then you can do advanced actions to increase the relationship depth. You can see what the depth is from the green bar above the NPC character. It is similar to a health bar but instead of decreasing it you act to increase it. ;) 
After you click OK there is a bug which causes an endless loop. Just reload the page and you will be able to start the game.