Moonlight Anthem

A tale of how the romance between Princess Serenity and Prince Endymion developed during the Silver Millennium, as witnessed by Princess Uranus. English translation can be read here.

Welcome To The Paradise

This doujinshi takes place during the Dark Kingdom arc of Sailor Moon, and features a few of the Four Generals, as well as Tuxedo Mask. Updated scans by wolf1806.

Zero

Reverse is a dramatic romance involving Sailor Moon, Tuxedo Mask, and Prince Diamond. The inner soldiers also make an appearance, and the story appears to take place at some point during the R storyline.