Goei No Method Saidai Hyoteki No Shojo to Choten No Ansatsu Sha (Dengeki Bunko) [Light Novel]

[Machine Translation] Michizane Aihara, the former best "assassin" in the underworld, wants to live a peaceful school life. His dream of high school life finally begins when he is admitted to Katsureikan Gakuin, a private school, but it doesn't. As soon as he entered the school, he was asked by the school administrator, who knew about his past as an assassin, to guard the "biggest target" in the world, a girl named Tori Kuze. Tori has just been abducted to the school's gymnasium. Michizane, who has left the underworld, is not sure whether to save Tori or not, but he realizes that something is wrong with this case. He teams up with the best "detectives," "martial artists," "fortune tellers," and "swindlers" in the underworld to save a girl who wants to die in this school battle fantasy!

元・裏世界最高の『暗殺者』相原道真は、平和な学園生活をおくりたい。念願叶って私立克礼館学院に入学し、夢にまで見た高校生活がいよいよ始まる―ことはなかった。入学早々、暗殺者である過去を知る学園管理者から、世界中で最も狙われている『最大標的』の少女、久世灯理の護衛を頼まれてしまう。その灯理は、ちょうど学園の体育館に拉致されたという。裏世界から足を洗った道真は灯理を助けるか迷うが、この事件は何かがおかしいことに気づき―。裏世界最高の『探偵』『武闘家』『占い師』『詐欺師』と護衛チームを組み、死にたがりの少女を救う、学園異能バトルファンタジー開幕!