Nanatsu no Maken ga Shihai Suru

Summary

It’s springtime at Kimberly Magic Academy, and new students are beginning their first year. Among them are a skilled and studious boy, Oliver, and a headstrong samurai girl, Nanao. They soon form a unique bond in the halls of Kimberly, but this picturesque school isn’t what it seems. Dark secrets and endless danger lurk behind every corner. Can these wizards make it to graduation alive?!

(Source: Crunchyroll)