On Christmas Eve, Hiro Hirono runs into Miyako Miyamura, a frivolous girl who "borrows" his bicycle in order to chase down a purse thief. After Hiro finds his bicycle wrecked and Miyako unconscious, the two unexpectedly spend their Christmas Eve together, and when they discover they go to the same high school, their accidental relationship develops even further. This sparks the jealousy of Hiro's childhood friend Kei Shindou, whose pure approach to life catches the eye of Kyosuke Tsutsumi, a womanizing photographer searching for the perfect shot. Elsewhere, Renji Asou, a boy who dreams of being a girl's knight in shining armor, has a chance encounter with Kei's twin sister—the overly shy Chihiro Shindou, who spends her time reading alone—at an abandoned train station. The two quickly become friends and eventually decide to write a novel together. However, when Renji discovers Chihiro's secret, a disability that causes her to have an eternally ephemeral memory, his childish ideals will be put to the test. Guided by two mysterious adults, these youths' relationships intertwine in a heart-rending tale of love, rejection, acceptance, and memories.

In a post-apocalyptic society, much of earthquake-riddled Japan has been left to ruin, resulting in an abundance of greenery. Governments manage much of the world's emissions, resulting in a massive class divide and economic disparity. The Japanese government launches "Project Atlas," a utopian city that will replace Tokyo but can only fit a certain amount of people. This limitation means that some people will have to live outside the city in jungles, as refugees. However, with any flawed plan comes those who are willing to challenge it. These include Kuniko Houjou, an heir to a renegade town; Mikuni, a mysterious and powerful child kept in a secret temple; Kunihito Kusanagi, a soldier for the high-tech and exclusive monopoly Atlas; Karin Ishida, a genius economics whiz with her hand in markets across the world; and the villainous Ryouko Naruse, leading Atlas in its domination of this future world. Can this group of rebels, forming a movement known as "Metal-Age," band together to demonstrate that inclusion and teamwork prevail over cruel segregation? [Written by MAL Rewrite]

The "Howard Resort Hotel" is an entertainment destination where people gather from around the world to grab huge fortunes. In the casino is a beautiful female dealer named Rio Rollins, known far and wide as the "Goddess of Victory". In order to approach closer to her mother, one of history's greatest dealers, she does battle to gather up the legendary cards called "gates". Those who gather all 13 gate cards are presented with the title MVCD (Most Valuable Casino Dealer), proof that they are a top dealer. Set in a vast resort, an exciting battle begins with rival dealers that'll take your breath away! Throw in some "supreme comedy" and a story that makes you cry when you least expect it, these cute and sexy girls will explode off your screen! With everyone's cheer of "Leave it to Rio!", Lady Luck'll be with you, too!

Years ago, many magical "Artifacts" were stolen and scattered throughout the world. They fell into the hands of people who were not supposed to know of their existence, causing misfortune to those who abused their power. The Hoshisato family of magicians has special access to the Artifacts, and they take it upon themselves to return them to their rightful place. Despite her inexperience, Kana "Hatena" Hoshisato wishes to aid her parents Mamoru and Maeve in their quest, doing her best to improve. Meanwhile, her childhood friend Makoto Shiranui has come to their mansion to study magic under her father's tutelage as part of a promise they made years ago. Hatena is excited to see her friend again, only to be utterly disappointed when the person she thought to be a girl all these years turns out to be a boy, leading to a bitter reunion. Before long, Makoto comes to know of the Artifacts and the true identities of the magicians he admires. Unfazed, he continues to strive to fulfill his promises and stay true to why he learns magic—to ease the sadness of people around him and, most importantly, to become a person worthy of being Hatena's partner. [Written by MAL Rewrite]