>>53193060I always recommend Ai: Somnium. I think it's the best introduction to Reine's content if you are interested in her longer form stuff. It's not as well known a story or game, so you get to experience it alongside Reine, which is great for getting to know her. The first game was really early in her career, so there's a lot of debut personality and nervousness. If you don't want to deal with that the second says it can be stand alone, but you really should know the first game. This is good because it lets you see how she's changed and how she's stayed the same.
https://www.youtube.com/watch?v=4ViHBLVOEt8https://www.youtube.com/watch?v=voVSNqjl8JgIf you want a one off then Bad End Theater
https://www.youtube.com/watch?v=w0-ps_41k-E 