Very good beginning. I enjoyed reading it and was also saddened by the fact that Usagi died.

Just one thing though; I got very confused with all the names. Perhaps in the next chapter you could write about who's who or edit the first chapter a little. Maybe give a little detail about who the Senshi married and maybe go on a little about Mamouru and how he is at present.

I loved the fact that you had incoporated Chibi Usa into being the moon princess and the "rabbit on the moon" story.

I'll enjoy reading the rest!