Mao No Kyoshitsu Ni Shu Me Kyoshi Ha Seito Wo Nidoto Shinasenai (Dengeki Bunko) [Light Novel]

[Machine Translation] Theo Proteus, a teacher of magic, mentored the students in the remedial class at the Garden of the Holy Maidens," an educational institution for female mages. He taught his students magic as the art of saving lives," but they were suddenly conscripted into a war that broke out, and every single one of them was killed in action. Swearing revenge against the enemy who killed his students, Theo was executed as a war criminal only to find himself transported back to one year before graduation, just moments before he was about to begin teaching them... Determined not to let her students die in this second chance at life, Theo resolves to do whatever it takes. Even if it means being hated, she will make them abandon any notion of saving people" and train them to become the strongest. After all, magic is nothing more than a tool for killing people" .

魔術学の教師・テオ=プロテウスは、女性魔術師教育機関《聖女庭園》の落ちこぼれクラスの生徒を育て上げた。『人を救うための術理』として魔術を授けた教え子たちは、しかし突如起こった戦争に召集され、全員が戦死してしまう。教え子を殺した敵への復讐を誓いながら、戦争犯罪人として処刑されたテオだったが、気がつくと卒業式の一年前、彼女たちに授業を始める直前に戻っていて...。二周目の世界では絶対に教え子を死なせないため、テオは覚悟を決める。たとえ嫌われてでも、彼女たちに人を救うなどという考えを捨てさせ、最強に育て上げてみせる。魔術は『人殺しの道具』なのだから―。