Ars Goetia ~Munou to Yobareta Shounen wa, 72 no Akuma wo Shieki Shite Musou Suru~

Story:

"I have decided not to expect anything from you anymore."One day, Norman is told this by his father and is kicked out of the house. There was no way around it. Because Norman could not use magic at all. However, Norman's fate changes drastically when he encounters the Grimoire "Ars Goetia". This grimoire was used to summon 72 demons. The demons summoned by it, however, bring about a shocking revelation to Norman. Yes, there was a reason why Norman could not use magic.