Books like Pretty Guardian Sailor Moon, Vol. 2

The mysterious Tuxedo Mask has revealed his identity, forcing Usagi to come to terms with her growing affections for the masked vigilante, all the while defending the people of Earth from renewed attacks by the sinister “enemy”. Everything threatens to overwhelm even Sailor Moon when suddenly a new Sailor Guardian appears. Could this new Guardian be the Moon Princess the Sailor Guardians are sworn to protect?