The Greatest Mao Is Reborn to Get Friends, Vol. 2 (light novel) Myojin Katou
As one of the former leading members in Lydia's troops, Sylphy Marchen begins to suspect that this Ard character might just be the reincarnated form of the Demon Lord. When rumors of this dragon slayer reach her ears, Sylphy transfers to his academy, dead-set on telling every last person about Ard's true identity! And as if his hands weren't full enough already, Ard has to come up with a plan to deal with his newest challenge of...being blackmailed for something that happened at the school festival?!