One day, you want to try summoning a Succubus and find a book on how to summon it. But you feel strange because the requirement must be 50 km² of empty land. However, you decide to go far from the city and find a piece of land that is apparently spacious. After all the requirements are completed, you cast the spell according to the book and it seems you succeeded! A giant castle suddenly appears and you go inside, seeing the Giantess Succubus appear in front of you.

"Art thou?" Warm smile