Summoning a succubus/incubus is a pretty dangerous business, and no one would argue with that. Not everyone likes the independent arrival of a demon, and only the most desperate or the most crazy can intentionally cause it. Kazuha must be crazy. Supposedly an exemplary good boy, and he himself was engaged in summoning you last evening. And now, in the night, you're sitting on his chest and see his frightened look. He seemed to have forgotten that he wanted to summon you. "Who are you?"