Ryūji Kisaragi is a normal high school boy whose peaceful life is turned into an adventure by the return of his second cousin Eriko Nanao. Ryūji and Eriko seize a relic box from a black broker, and in the box they find Rose, a red dragon girl. In order to protect Rose from the black organization, Ryuji decides to fight using his power as a relic handler.
Lucy is a 17-year-old girl, who wants to be a full-fledged mage. One day when visiting Harujion Town, she meets Natsu, a young man who gets sick easily by any type of transportation. But Natsu isn't just any ordinary kid, he's a member of one of the world's most infamous mage guilds: Fairy Tail.
Miss Kobayashi is your average office worker who lives a boring life, alone in her small apartment–until she saves the life of a female dragon in distress. The dragon, named Tohru, has the ability to magically transform into an adorable human girl (albeit with horns and a long tail), who will do anything to pay off her debt of gratitude, whether Miss Kobayashi likes it or not.
Miyanaga Saki is a first year high school girl whose family would get angry if she won the family mahjong games. But losing would also have its consequences. Because of this she develops a new way of playing that allows her to stay on the thin line between winning and losing, the +/- zero score, an almost impossible score. In a game that relies mainly on luck, the +/- zero score is harder than winning, but Saki can achieve this every time. Having always hated the game, her friend from middle school, Suga Kyotoro, forces her to play in the schools mahjong club. Her developed skill and superhuman luck has made her a worthy mahjong opponent, even to the middle school's national mahjong champion.
Nodoka Haramura's appearance on television playing in a high school mahjong tournament inspires her old Jr. high school friends to reform their schools club so they can meet and play her in the National High School Mahjong Tournament.
Haruka Kasugano and his twin sister Sora have lost both their parents in an accident, and with them all their support. They decide to move out of the city to the rural town where they once spent summers with their late grandfather. At first everything seems familiar and peaceful, but changes come as Haruka starts to remember things from his youth.