Impressed by Nanao Hibiya's skill with a sword, Kimberly Magic Academy instructor Theodore McFarlane saves the samurai from certain death amid a fierce battle. With his encouragement, Nanao enrolls in the academy, where she instantly becomes a celebrity after she and four of her peers save a student from an enraged troll. Under the leadership of Oliver Horn, a young man who seems to hide a troubled past, Nanao and her newfound friends start their magical apprenticeship at Kimberly—where only four out of five students make it to graduation in one piece. It does not take long for Oliver and his friends to experience the dangers of the academy firsthand, as a near-death encounter in the labyrinth under the school leaves Nanao grappling with her bloody past. The inexperienced yet determined students must stick together if they want to have a chance to survive and uncover the mysteries that the academy holds.

In the late 19th century, as the cruel times of the Bakumatsu period came to a close, a new Meiji era marked the age of restoration for Japan. With the war over, its infamous hero Hitokiri Battousai disappeared into thin air, leaving only his legend behind. Years later, a seemingly plain wanderer named Kenshin Himura encounters Kaoru Kamiya, the owner of a struggling local dojo in Tokyo. Kaoru pursues a self-proclaimed Battousai who roams the streets, indiscriminately killing citizens and police officers. Furthermore, the warrior professes to use the Kamiya Kasshin-ryu—a sword style developed by Kaoru's father deeply rooted in the essence of life, not death. Kenshin decides to help Kaoru take down the impostor and restore her father's dojo. Unbeknownst to all, Kenshin is none other than the real warrior whose name still terrifies the people. Although Kaoru eventually learns the truth, his oath to atone for his murderous history by bloodlessly protecting the weak moves her, and she welcomes Kenshin to stay at her dojo. However, Kenshin's ideals are soon challenged by ghosts of the past and enemies of the present.

"My senpai from work... is tiny and cute." Shinozaki is an office worker who is taken care of and coddled by his senior team member Shiori Katase: a gorgeous, profoundly kind, loving, and diminutive woman. Shinozaki certainly hopes that she's not doing it out of duty... but her joy of doing so increasingly exposes her feelings!

A long time ago, there existed a Demon Lord who terrorized throughout the world until a Hero stepped up to the stage and challenged the Demon Lord, ultimately defeating him and ending his reign. The Hero then created Rosewood Academy, an academy made to help heroes-in-training achieve supremacy and help defend the world when needed that enrolls only the best of the best. Enter Arnest Flaming, a girl with a high sense of duty and the top student at the academy, hence receiving the alias "Empress of Flames" who one day encounters the lively, carefree new transfer student Blade, a boy who seems to equal her in power, something that she finds really irritating. Arnest was then personally requested by The King to supervise, and show Blade around the academy during his stay. The story follows the students' struggles in their quest to become heroes.