Demon God Illya-Chan Never Admits Defeat

That is what it would be like to exist as an individual as Illyasviel von Einzbern. A magic genius who far exceeds the family's expectations... No, he is now a crowned magician. Not only did he summon the established berserker, he also allowed the three-body heroic spirit to settle in his body and become a pseudo-server. Not controlled by the magic power of the Holy Grail, but dominated by the magic power of the Holy Grail... In fact, it is the story of Illya, the demon god used in the decisive battle of fate. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.