I've recently watched this movie as well as Last Quarter (featuring HYDE again) between the two hands down Last Quarter is far better in my opinion. Last Quarter is a great movie and I'd recommend it to you over Moon Child considering it's PG-13 rated. The story is more engrossing and it still maintains that trademark supernatural quality of film. ^__^ but that's just my 2 cents.
Anyway, you meet a younger version Sho (Gackt) who's a pick-pocket in the economical collapsed-setting of Japan. He than meets Kei (HYDE) who is a vampire on the verge of death and from there a series of odd encounters occur. The story starts with a scene of Sho and his brothers trying to rob a gangster while attempting to take his money things get way out of hand. So, follow a series of running away sequences where Sho meets Kei
SPOILER!! (Highlight to view)
[color="Black"]and in exchange for Sho's blood Kei vows to help him through this dilemma.[/color]
After the exchange Kei than kicks the gangster's butt revealing to Sho's brothers his 'vampiric' abilities. None of them ever want Sho to go near Kei again but since that 'aforementioned spoiler' was made that's not really an option any longer. Afterwards, we are taken to present day Japan to have a look into the lives of both an older Sho and Kei.
There is violence within this movie. A scene where Hyde has his mouth drenched with blood, random vampire biting, as well as bad language. The story is at times entertaining if not very outlandish. If you're a Hyde or Gackt lover than seeing this movie would be a must for you or if you just enjoy the supernatural: Moon Child would be right up that alley!
I wouldn't recommend it to anyone 15 years and younger as some of the plot twists might be confusing and some of the sequences too scary.
Though just one thing I'd like to note this movie is rated:III in terms of Hong Kong rating which is considered a low end rated R film in America.