Ok, so to keep it simple, just like what I wrote in the description, this is an alternate universe where Yamauchi Haruki is a monster that is pretty close to Ayanokouji.
(I will let you readers judge if that's the truth or not.)
Moreover, Yamauchi hid so well that nobody, not even Ayanokouji, found out because he actually knows how to act like a pervert from real-life experience, where Ayanokouji didn't even know what normal is.
That's why this is a reaction fanfic since he can only be revealed in this way.
This cast includes ANHS students plus teachers plus Tsukishiro and Sakayapapa plus Manabu and Tachibana from around the time after Y2V2 and before Y2V3.
The story takes place after the students have just finished reacting to COTE Y1V11.5.
One more thing, Yamauchi escaped being expelled in Y1V10 by raising his grade a little since the beginning, making his grades slightly lower than the average of the class. The one who got expelled at the end was Hondo, or whatever his name is.
Also, English is not my first language, so please be kind with your criticism.
Anyway, I hope you will enjoy my fan fiction.