Curious Play = Fushigi Yuugi
But actually in the real world, Miyaka and UI are like best friends. So it does have a great deal of conflict in it. I would not really suggest to watch this because it has like hundreds of episodes. But if this is in any way you feel like this is interesting, you can go ahead and watch it. Also, this was really famous in 96 or something like that because it also aired on Animax. When we had it