An alternate world ruled by swords, magic, and monsters where four moons can be seen in the sky. The dark and chaotic twilight of the “Age of Tower” ended for this world called Stellamund and it entered the prosperous “Age of Crown”. But the wizards who triggered the great war during the Age of Tower no longer hold the power they used to have, and quietly researched the great magics that were lost, in a magical academy called Grimoire. This is a story expanding three years of an extraordinary great wizard who was born in such age, the girls who become his pupils, a ruin from the old age, “Black Tower” that they live in, and the people that gather around them. The main character Domino became the 9th great wizard of the Grimoire Academy.