MTS

So guys I have here a visual novel called Hoshi Ori Yume Mirai. They are in separate files having a part1 and a part2 rar file. I extracted the files and a .iso and a .mds file appears. So I clicked the .iso file and a virtual disc containing the game appeared in my Windows Explorer. I clicked that and these files appear. I don't know what to do with these files and how can I play this game. I am currently running Windows 8. What will you do with these and how do you install the game with these files? I don't know a lot about computer software and programs so if anyone here knows how to install it, please do help me :-)