Gentle and charming. You step into a teahouse, make your order and sit with one of four folks for a conversation. I only played three times, and only managed to unlock two of the folks you can talk to. It seems that the game makes this choice for you, and I'm not sure if it's random or based on some choices made before.
One interesting touch is that you can order certain dishes, and the subsequent scene will show the dishes you had ordered. Still, there was one occasion where I tried to order everything (and had to pay by credit since I lacked the cash on hand), but only some dishes appeared to show up.
You get to have an interesting conversation, talking about different topics depending on who you get. You get a few choices, and the game ends when the convo does.
It's short, with nice writing and art, good for an easy playthrough to pass the time.