Keita Amano is a typical high school gamer living out an average student's life. One day, however, he has an unexpected meeting with the cutest girl in school that makes him want to disappear without a trace! This girl, Karen Tendou, is an exemplary student who is proclaimed to be the school's idol. She discovers that Amano is a gamer, and this newfound knowledge incites a passionate desire within her to recruit him into the game club. Upon visiting the club, Amano is forcefully made aware of a side to gaming wildly different than the one he loves so dearly. Tendou's interest in Amano begins shaking up what was once an uneventful life, filling it with spontaneity, awkwardness, and a little bit of mayhem. As a result, every day becomes a comical battle for Amano's sanity as he tries to adapt to these wild, unexpected changes. [Written by MAL Rewrite]

Unaired anime episode bundled with the limited edition of High School DxD DX.2.

Shuuichi Kagaya is what one would consider an average high school student, but sometimes, he turns into a monster. He doesn't know how or why he got his abilities, only that he would prefer no one knows about them. One night, he finds a building ablaze with a girl trapped inside. Deciding to save her, he transforms and carries her to safety, but accidentally drops his phone. The next day, the girl he saved—Claire Aoki—finds him and confronts him about his monster identity. She even goes so far as to push him off the school roof to prove her theory after Shuuichi denies her allegations. Desperate to save himself, he transforms, and Claire snaps a picture in order to blackmail him into telling her everything he knows about monsters, which, ironically, isn't much. As it turns out, Claire has a secret of her own: she has been searching for her sister, who also became a monster. She enlists Shuuichi's help to track her down, but they aren't the only ones searching for answers. [Written by MAL Rewrite]

Seiken Tsukai no World Break takes place at Akane Private Academy where students who possess memories of their previous lives are being trained to use Ancestral Arts so that they can serve as defenders against monsters, called Metaphysicals, who randomly attack. Known as saviors, the students are broken up into two categories: the kurogane who are able to use their prana to summon offensive weapons and the kuroma who are able to use magic. The story begins six months prior to the major climax of the series during the opening ceremonies on the first day of the school year. After the ceremony is over, the main character, Moroha Haimura, meets a girl named Satsuki Ranjou who reveals that she was Moroha's little sister in a past life where Moroha was a heroic prince capable of slaying entire armies with his sword skills. Soon afterwards he meets another girl, Shizuno Urushibara, who eventually reveals that she also knew Moroha in an entirely different past life where he was a dark lord capable of using destructive magic but saved her from a life of slavery. Can those whose minds live in both the present and the past truly reach a bright future? Delve into the complex world of Seiken Tsukai no World Break to find out!