Act 19 Time Warp - Sailor Pluto -

Chibiusa, Sailor Moon, Sailor Venus, Tuxedo Mask, and the cats Luna and Artemis travel ahead in time, coming face to face with the guardian of the Space-Time Door, Sailor Pluto, keeper of the underworld. Naoko Takeuchi wrote and illustrated the chapter, part of the Black Moon arc.

Chibiusa explains she hails from Crystal Tokyo of the thirtieth century. Luna suspects the captured inner guardians were dragged there by the Black Moon, and Venus argues the group must travel forward to rescue both the missing friends and Chibiusa's homeland. That night Luna recalls serving Queen Serenity and dreams of a door the queen described as watched by a solitary guardian, a memory the queen once told her to forget.

Using Chibiusa's Space-Time Key, the party opens a portal, though Chibiusa is torn away from the others in transit. Aware the travelers are bound for Crystal Tokyo, Esmeraude sends the Boule Brothers, Chiral and Achiral, to intercept them. The group reaches the door from Luna's dream, and a voice orders them to halt as Sailor Pluto reveals herself. She attacks until Chibiusa reappears and calms her, the two being close friends, and it emerges that Chibiusa is likewise a princess of the future Moon.

Bound never to abandon her post, Pluto lets them pass through the gate. They emerge in the thirtieth century to find Crystal Tokyo devastated and a grim black obelisk looming in the distance. Making for the palace, the group is snared by the Boule Brothers, but Tuxedo Mask breaks the trap and joins Venus to destroy the pair. At the crystal tower they discover a beautiful woman sleeping in a crystal casket. Chibiusa reunites with her white kitten Diana, and a ghostly figure closely resembling Tuxedo Mask appears before the team.

First appearances include Sailor Pluto, Neo-Queen Serenity, King Endymion, Diana, and the Boule Brothers, along with the Crystal Palace and Space-Time Door locations, the Space-Time Key, and the Dead Scream attack.