Invincible I Have Been Summoned

I, the agent of the will of the universe, was summoned by a female high school student, but the summoning was not completely successful. Kasumigaoka Shiha: What's going on? A soul suddenly appeared in my body, and what's going on in this world? Why are there so many monsters and monsters in my world! ! ! This is the story of a failed summoning of the agent of the will of the universe, which leads to the possession of a female high school student. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.