Kuro No Sozo Shokan Shi 6 [Light Novel]

[Machine Translation] Saeki Tsuguna is an ordinary high school student who was forced to die an unexpected death by God. He is reborn in a different world filled with the threat of magic and monsters, and is given the ability to summon original demons in order to collect the powerful grimoires divided into seven. One day, he receives an invitation to visit a castle from the empress who rules the Mephistobal Empire. Despite her doubts about the true intentions of the invitation, Tsuguna cannot refuse the invitation from the ruler of the demon tribe, and visits the empire once again. However, Tsuguna does not hesitate to declare that he will use force against the empress, who has invited him and spat out unforgivable insults. The strongest summoner's challenge to correct the distortion of the world begins as he puts the meaning of his existence on the line!

神様により不慮の死を遂げさせられたごく普通の高校生、佐伯継那。彼は魔法とモンスターの脅威に満ちた異世界へと転生し、七つに分けられた強大な魔書を集めるべく、オリジナルの魔物を召喚する能力を与えられる。ある日、メフィストバル帝国を治める女帝から城への招待状が届く。その真意に疑問を抱きつつも、魔族の支配者の誘いを断ることなどできず、ツグナは再び帝国を訪れるのだった。しかし、自ら招いておきながら許しがたい侮辱を吐き捨てた女帝に対し、ツグナは迷うことなく実力行使を宣言。かくして膨大な魔力を誇る魔族随一の使い手がツグナたちの前に立ちはだかる―己の存在意義に懸けて世界の歪みを正すべく、最強召喚師の挑戦が始まる!