High School DXD Vol. 8 (manga)

"I wanna do dirty things with the President!" Issei wildly pitches this explosive straight ball at an all-important conference!Archangels, devil kings, and fallen angels come together at the "Three-Way Deadlock Conference," but a mysterious power crashes the party to attack the peace-seekers...! And when a dastardly bunch of villains sets its sights on Gaspard's unique powers, Issei gives them a taste of his raging fists, all to protect his dear kouhai!