Eiyuu Kyoushitsu no Chouetsu Majutsushi: Gendai Majutsu wo Kimeshisha, Tenseishi Tenshi wo Shitagaeru

A magical academy attended by nobles and elite magicians, Calgrande serves as a training ground for powerful talents destined for the national military. Yuuma, a magician who previously saved another world, has been reborn into this one and now enrolls at the academy to pursue a specific objective. Regarded as a potential hero of his generation, he lives comfortably with his genius, brocon sister-in-law and another sister-in-law who is an indulged angel. This peaceful life is disrupted during an extracurricular trip to the demon world. When threats from the evil faction of this world target his beloved sister, Yuuma, the magician from another world, begins to reveal his true power.