Rio Rollins—called the "Goddess of Victory"—is a dealer who works in the casino of Howard Resort, and strives to follow in the footsteps of her missing mother to become the MVCD (Most Valuable Casino Dealer). In order for her to do so, she has to collect all 13 special magical cards called "Gates", and along the way, she faces different challenges and trials.
Stars: Marina Inoue, Aya Uchida, Ayana Taketatsu
Directors: Takao Kato
Mint Clark goes on holiday with her grandfather to the Howard Resort. While her grandfather enjoys the casino, Mint explores the resort and eventually meets the casino's most famous dealer, Rio Rollins Tachibana.
Rio is asked to train a new recruit named Anya Helsing to be a dealer. Anya is quick to point out that Rio owns a "Gate", one of thirteen rare cards that are wagered in battles with other "Gate Holders" to determine the strongest dealer in the world.
Howard takes Rio to a supposedly haunted castle which used to feature a casino owned by a woman named Misery, with plans to refurbish it as part of the Howard Resort. During the stormy night, lightning strikes the castle, which frees the ghost of Misery, who goes to the Howard Casino and spreads ...
Rio takes Rina on a tour of the resort, introducing to the other employees. Rina also notes that Rio is a Gate Holder, mentioning how Rio's mother, Risa Rollins, once owned all 13 Gates. Their date is cut short when a man named Bull Hard takes Anya hostage.
Howard informs Rio, Rina and the others that Cartia had challenged Rio to a Gate Battle against someone named Jack with Howard Resort on the line. Mint asks Linda to draw the culprit who manipulated her data, which leads her to suspect Carlos Tanaka, an Afro samurai with terrible luck, as the cul...
Howard sends Rio, Rina and Anya to work at the Sky Resort casino situated at the top of a mountain. Once there, they meet the resort's dealer, Linda, who gives them a tour of the facilities. She is soon revealed to be a robot, and the resort's main terminal.
Only two hours after the battle against Jack, Howard reveals another Gate Battle will take place against a woman named Queen despite Rio being exhausted from the last battle. The battle sees Rio and Queen flying up a wind tunnel while shooting targets.
In order to save Rina, Rio has to guess which hand King will have a coin in after he flips it, not made easy by Rio's fatigue and King's history as a con artist. However, Rio sees through his strategy of destroying the coin, and picks one a hand that's guaranteed to be empty.
Rio and Dana follow her ferret, Chip, to a casino where the mysterious Joker is holding Howard captive. She challenges Rio to a game of blackjack in order for her to escape her Roll Ruler, which forces them into a draw at every play.
Rio and her friends enter Goldschmidt Kingdom and start winning big in the various attractions in order to be able to buy back the resort. However, Mint's bear Choco goes missing, so Rio goes with her back to the casino to search for it.
After publicly announcing the terms of the Gate Battle, Howard takes Rio and the others on vacation to an island town to relax before the battle. While looking for Rio, Mint meets an old man, who explains Rio used to come to this place with Rina and Risa when she was young.
Rina gains a huge advantage over Rio, managing to lead 14-0. However, Rio soon starts to make her comeback, and as the two put their Roll Rulers to the test, the Gates start to glow. With the game tied 14–14, Rio takes Rina and Joker into her Roll Ruler world, where secrets cannot be hidden.