Act 4 Masquerade Dance Party

Belonging to the Dark Kingdom storyline, this chapter opens with the arrival of the Princess of D Kingdom in Tokyo. Her rumored national treasure draws the attention of both the guardians and the Dark Kingdom's Nephrite, each side wondering whether the object could be the Silver Crystal itself.

Luna studies files on the guardians and on Mamoru Chiba, unsure whether he stands with them or against them. News of Princess D's visit, tied to her diamond-rich kingdom, fills the papers and puts police across the city ahead of a ball in her honor. At the arcade meeting, Rei bristles at guardian duty and presses Luna about their origins; Luna reveals the team was gathered not merely to fight the enemy but to guard a sealed princess who likely holds the Silver Crystal, and that recovering their lost memories, Usagi's above all, will complete their power. Curious despite herself, Usagi uses her disguise pen to slip into the embassy ball as a princess.

Inside, as Ami and Rei search the crowd, Usagi drifts through daydreams until Tuxedo Mask, wearing a plain mask and tux, sweeps her into a waltz. The two dance until Luna interrupts, and he slips away. The real Princess D turns out not to be the one they seek. When an enemy servant seizes the princess's body to steal both the treasure and the guests' energy, Usagi is flung over a balcony railing; Mamoru barely catches her wrist, and only her disguise pen, turned into an umbrella, floats them safely down.

Transforming into Sailor Moon, Usagi finds her tiara gone, and a new one forms as warmth spreads through her. With the guests being pulled into darkness and Mars' Akuryo Taisan useless, Tuxedo Mask urges her to answer shadow with light; she bounces moonlight off the fresh tiara and calls Moon Twilight Flash, destroying Nephrite's shadow creature. The rescued Princess D then presents her treasure, a two-thousand-carat diamond statue of her kingdom's queen.

Afterward, a thirsty Usagi drinks from the leftover cups, grows tipsy, and tumbles into Tuxedo Mask's arms; he lays her against a pillar and kisses her, and both feel the pull of a shared, distant past. When Luna demands to know whether he is friend or foe, he admits that since they are all chasing the Silver Crystal, they may well be enemies. Elsewhere, a young woman senses a coming storm.

Naoko Takeuchi wrote and drew the chapter, which delivers Sailor Moon's first use of the Moon Twilight Flash attack. It also marks early, unnamed glimpses of Makoto Kino, the future Sailor Jupiter, and the debut of Usagi's father, Kenji Tsukino.