"President Rias Gremory's virginity belongs to me!"
— Issei Hyodo, setting the stage.
"Remember to practice with these."
— Xenovia offering Issei some condoms...in the middle of homeroom.
"My name is Rias Gremory. And I am a Devil."
— Rias Gremory presenting herself to Issei.
"I want you to remember him. The man called Issei Hyodo."
— Ddraig, after Issei's death and his conversation with Ophis.
"I won't forget. My only friend."
"If it's a god then I will kill it with this spear. Come, let the battle begin."
— Cao Cao
"I just believe in my own body, that's all."
— Sairaorg Bael
"Would you sell your soul to the devil? No? How about if they’re stonkingly hot and have a batallion of attractive followers? Yes? Well, here you go; you’ll like this show!"
— Masako X, recapping the series.