15 year old Kamui returns to Tokyo after being gone for 6 years. His childhood friends Fuma and Kotori are very excited at his return, but are hurt and confused by his change in character. Rather than the kind and cheerful boy that they knew, Kamui is cold and quite. But Kamui has a reason to be moody - the day of reckoning is near and the Dragons of Earth and the Dragons of Heaven will battle to decided the fate of humanity, and Kamui must pick a side to join.
This series is, in my opinion, CLAMP's greatest masterpiece. X was the first CLAMP series I was introduced to, and has remained my favorite. To explain why this series is great, I have outlined the pros and cons below.
~Artwork - As with all CLAMP's work, the artwork and character designs are detailed and beautiful. Some of the characters look very similar to other CLAMP characters, but some are completely unique to X. Some of the imagery is very impressive, and with a wide range of characters (the Dragons alone add up to 14) and a wide range of situations leads to a wide range of different types of scenes that show CLAMP's creativity and imagination.
~Music - The music for this show is some of the best I've heard in any screen production. The main theme, Destiny, is very memorable and beautiful. I bought the soundtrack and Destiny is one of my top played songs, despite being instrumental.
~Story and Characters - X boasts a complicated story with complex characters. The cast of characters is large and many of them have their own story to contribute. The interactions between the Dragons of Earth and the Dragons of Heaven are quite realistic - even the people wishing for the destruction of humanity are only human themselves and this especially evident when they encounter someone from the opposite side.
~This isn't a very cheerful series - it is about the end of humanity after all. I don't want to spoil anything, so won't go into detail about any tragedies that occur. I thought that tragedy was essential to the story, but it was still sad and might make you cry (I think I did).
~I like having a lot of characters, but it did get a little confusing at times!
~Even at 24 episodes, this series wasn't quite long enough to fit all of the story into it. The manga is 18 volumes long, and still hasn't ended. I think that the anime creators did a good job of picking which things were cut, but it still felt a little rushed in some places.
Obviously, the pros far outweigh the cons and you should totally watch this series! This set is pretty cheap at $30, which is about half the price I originally paid for the series, so you are getting quite a bargain!
One final note: I watched this series in Japanese and the cast all did an excellent job. I haven't see it in English, so I can't say if it is any good or not. But I really liked the Japanese dub, so I would recommend it.