Act 1 Usagi - Sailor Moon

A talking black cat named Luna reveals to fourteen-year-old Usagi Tsukino that she is Sailor Moon, a Guardian sworn to love and justice, and that her calling is to assemble four more Guardians while safeguarding both the immensely powerful Silver Crystal and the vanished Moon Princess against the Dark Kingdom.

The chapter opens on Usagi's ordinary chaos: oversleeping, arriving late to class, scolded by her teacher over a dismal English score, and teased by her friends Naru and Umino. On the walk to school she had stepped on a stray cat and peeled two bandages from its brow, uncovering a crescent-moon mark. Talk of a jewelry heist foiled by the mysterious Sailor V draws the girls to a discount sale at OSA-P, the shop run by Naru's mother, where a tuxedoed stranger later mocks Usagi over the crumpled test she tosses aside, then muses that the store may hide the Silver Crystal.

That night Luna scratches Usagi awake, introduces herself, and presents a Transformation Brooch, prompting the cry of Moon Prism Power, Make Up that turns the girl into Sailor Moon. Sensing Naru's screams, she races to OSA-P, where Naru's mother has been unmasked as a monster draining shoppers of their energy. Hemmed in by brainwashed victims and wounded, Sailor Moon dissolves into tears until her wailing looses a burst of sonic waves. Rallying at last, she flings her tiara to destroy the creature. A caped man calls himself Tuxedo Mask and slips away, leaving Sailor Moon instantly smitten, while a blond officer named Jadeite watches from afar and resolves to claim the Silver Crystal.

As the first chapter of both the series and its Dark Kingdom arc, this installment was written and illustrated by Naoko Takeuchi. It introduces a wide cast at once, among them Usagi, her mother Ikuko and brother Shingo, Luna, Naru, Umino, Motoki, Mamoru Chiba, and Jadeite, along with the settings of the Tsukino home, Usagi's middle school, the OSA-P jewelry store, and the Game Center Crown arcade.

The chapter also debuts the phrase Moon Prism Power, Make Up, the Transformation Brooch, and the tiara attack known variously as Moon Tiara Boomerang or Moon Frisbee, depending on the edition.