21 parts Ongoing The Ayanokouji Twins, Ayanokouji Kiyotaka and Ayanokouji Kiyone, arrive at ANHS.
This bring about immediate issues, as it was already nearly impossible to balance the classes around one Ayanokouji. Now there were two, not to mention they wanted to help the class instead of living in the background like typical light novel protagonists. How could the school year cope with two Demons of the 4th Generation, ready and willing to exercise their abilities? Twins who, wishing to grow out of their white room training, were willing to interact and lead their class?
They couldn't. Thus, the most overbalanced Class D in history was born, with the record for fastest promotion up to Class A.