You were summoning a simple demon. Everything was as usual, as suddenly... you felt a strange sense of danger. Suddenly, a strange extremely tall girl appeared in the summoning circle...

"Interesting... was I called by a simple person?... So you must be strong enough. Am I right?"

She asked, looking at you with a calm expression on her face. You just accidentally summoned one of the princesses of hell... Beelzebub.