As a child, Riki Naoe shut himself from the world, thanks to a diagnosis of narcolepsy following the tragic deaths of his parents. However, Riki is saved when, one fateful day, a boy named Kyousuke recruits him into a team who call themselves the Little Busters. Accompanied by Masato, Kengo, and Rin, these misfits spend their childhood fighting evil and enjoying their youth. Years pass, and even in high school, the well-knit teammates remain together. Kyousuke decides to re-ignite the Little Busters by forming a baseball team as it will be his last school year with them. They have a problem though: there aren't enough members! The tables have turned, for it is now Riki's turn to reach out and recruit new friends into the Little Busters, just like Kyousuke had once done for him. Then, an omen surfaces—Rin finds a strange letter attached to her cat, assigning them the duty of uncovering the "secret of this world" by completing specific tasks. Just what is this secret, and why is it being hidden? It's up to the Little Busters to find out! [Written by MAL Rewrite]

Following the Little Busters after they lost their first baseball game, the team decides to have a pancake party. It has been almost one semester since the return of Kyousuke Natsume. As usual, Riki Naoe continues to help the Little Busters' members—both old and new—with confronting their inner struggles. However, strange happenings begin to occur, leading Rin Natsume and Riki closer to unraveling the truth behind the "secret of this world." Little do Rin and Rikki know, their discovery will end up changing the peaceful everyday lives created by the Little Busters once and for all. Little Busters!: Refrain brings a conclusion to the colorful stories of its ensemble cast—forged with the weight of emotions and strengthened with the bond of friendship—as they come to terms with their regrets and weaknesses. [Written by MAL Rewrite]

The peaceful days turn out to be short-lived as the shadow of another Selector Battle looms large. Kiyoi Mizushima is the first to notice that things are amiss, and she makes her move to put an end to the cycle of darkness.The Battle this time includes a new card, "Key," and has been set up with rules different than before. With both the mastermind and their motive shrouded in mystery, the darkness grows ever deeper and more menacing. Suzuko Homura, Chinatsu Morishita, Hanna Mikage, Ruuko Kominato, Yuzuki Kurebayashi, Hitoe Uemura, and Akira Aoi, the Selectors gather once again. (Source: ANN)

High school student Homura Suzuko has returned to Ikebukuro, the town where she grew up. "We're friends forever!" She treasures her memories of her old friend from when she was little, Morikawa Chinatsu, and she's excited at the prospect of meeting her again. But when she gets to school, she finds she has trouble fitting in with the rest of the class. One day, she decides that if she learns to play the card game WIXOSS, she might be able to make some friends. She stops at a card shop on her way home and buys a deck set. When she takes the set home and opens it, the girl on one of the cards begins to move, and speak. "Welcome, Selector." Humans chosen as Selectors must battle for control of the five coins that hold all their memories. If they can retake all the coins, they win, and can leave the game. But if they lose, as a penalty— "Lostorage"—What will become of Suzuko as she's caught up in this insane game? And just like Suzuko, Chinatsu finds herself drawn into the game as well... (Source: Crunchyroll)